# Agents > langchain → Agents !!! note "Reference docs" This page contains **reference documentation** for Agents. See [the docs](https://docs.langchain.com/oss/python/langchain/agents) for conceptual guides, tutorials, and examples on using Agents. ## Classes - [`StructuredOutputError`](https://reference.langchain.com/python/langchain/agents/structured_output/StructuredOutputError) - [`MultipleStructuredOutputsError`](https://reference.langchain.com/python/langchain/agents/structured_output/MultipleStructuredOutputsError) - [`StructuredOutputValidationError`](https://reference.langchain.com/python/langchain/agents/structured_output/StructuredOutputValidationError) - [`ToolStrategy`](https://reference.langchain.com/python/langchain/agents/structured_output/ToolStrategy) - [`ProviderStrategy`](https://reference.langchain.com/python/langchain/agents/structured_output/ProviderStrategy) - [`OutputToolBinding`](https://reference.langchain.com/python/langchain/agents/structured_output/OutputToolBinding) - [`ProviderStrategyBinding`](https://reference.langchain.com/python/langchain/agents/structured_output/ProviderStrategyBinding) - [`AutoStrategy`](https://reference.langchain.com/python/langchain/agents/structured_output/AutoStrategy) - [`SubagentRunStream`](https://reference.langchain.com/python/langchain/agents/_subagent_transformer/SubagentRunStream) - [`AsyncSubagentRunStream`](https://reference.langchain.com/python/langchain/agents/_subagent_transformer/AsyncSubagentRunStream) - [`SubagentTransformer`](https://reference.langchain.com/python/langchain/agents/_subagent_transformer/SubagentTransformer) - [`LLMToolEmulator`](https://reference.langchain.com/python/langchain/agents/middleware/tool_emulator/LLMToolEmulator) - [`SummarizationMiddleware`](https://reference.langchain.com/python/langchain/agents/middleware/summarization/SummarizationMiddleware) - [`FilesystemFileSearchMiddleware`](https://reference.langchain.com/python/langchain/agents/middleware/file_search/FilesystemFileSearchMiddleware) - [`ModelFallbackMiddleware`](https://reference.langchain.com/python/langchain/agents/middleware/model_fallback/ModelFallbackMiddleware) - [`ModelCallLimitState`](https://reference.langchain.com/python/langchain/agents/middleware/model_call_limit/ModelCallLimitState) - [`ModelCallLimitExceededError`](https://reference.langchain.com/python/langchain/agents/middleware/model_call_limit/ModelCallLimitExceededError) - [`ModelCallLimitMiddleware`](https://reference.langchain.com/python/langchain/agents/middleware/model_call_limit/ModelCallLimitMiddleware) - [`BaseExecutionPolicy`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/BaseExecutionPolicy) - [`HostExecutionPolicy`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/HostExecutionPolicy) - [`CodexSandboxExecutionPolicy`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/CodexSandboxExecutionPolicy) - [`DockerExecutionPolicy`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/DockerExecutionPolicy) - [`Todo`](https://reference.langchain.com/python/langchain/agents/middleware/todo/Todo) - [`PlanningState`](https://reference.langchain.com/python/langchain/agents/middleware/todo/PlanningState) - [`WriteTodosInput`](https://reference.langchain.com/python/langchain/agents/middleware/todo/WriteTodosInput) - [`TodoListMiddleware`](https://reference.langchain.com/python/langchain/agents/middleware/todo/TodoListMiddleware) - [`LLMToolSelectorMiddleware`](https://reference.langchain.com/python/langchain/agents/middleware/tool_selection/LLMToolSelectorMiddleware) - [`ContextEdit`](https://reference.langchain.com/python/langchain/agents/middleware/context_editing/ContextEdit) - [`ClearToolUsesEdit`](https://reference.langchain.com/python/langchain/agents/middleware/context_editing/ClearToolUsesEdit) - [`ContextEditingMiddleware`](https://reference.langchain.com/python/langchain/agents/middleware/context_editing/ContextEditingMiddleware) - [`ModelRequest`](https://reference.langchain.com/python/langchain/agents/middleware/types/ModelRequest) - [`ModelResponse`](https://reference.langchain.com/python/langchain/agents/middleware/types/ModelResponse) - [`ExtendedModelResponse`](https://reference.langchain.com/python/langchain/agents/middleware/types/ExtendedModelResponse) - [`OmitFromSchema`](https://reference.langchain.com/python/langchain/agents/middleware/types/OmitFromSchema) - [`AgentState`](https://reference.langchain.com/python/langchain/agents/middleware/types/AgentState) - [`AgentMiddleware`](https://reference.langchain.com/python/langchain/agents/middleware/types/AgentMiddleware) - [`ShellToolState`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/ShellToolState) - [`CommandExecutionResult`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/CommandExecutionResult) - [`ShellSession`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/ShellSession) - [`ShellToolMiddleware`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/ShellToolMiddleware) - [`ToolRetryMiddleware`](https://reference.langchain.com/python/langchain/agents/middleware/tool_retry/ToolRetryMiddleware) - [`ToolCallLimitState`](https://reference.langchain.com/python/langchain/agents/middleware/tool_call_limit/ToolCallLimitState) - [`ToolCallLimitExceededError`](https://reference.langchain.com/python/langchain/agents/middleware/tool_call_limit/ToolCallLimitExceededError) - [`ToolCallLimitMiddleware`](https://reference.langchain.com/python/langchain/agents/middleware/tool_call_limit/ToolCallLimitMiddleware) - [`ModelRetryMiddleware`](https://reference.langchain.com/python/langchain/agents/middleware/model_retry/ModelRetryMiddleware) - [`Action`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/Action) - [`ActionRequest`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/ActionRequest) - [`ReviewConfig`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/ReviewConfig) - [`HITLRequest`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/HITLRequest) - [`ApproveDecision`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/ApproveDecision) - [`EditDecision`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/EditDecision) - [`RejectDecision`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/RejectDecision) - [`RespondDecision`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/RespondDecision) - [`HITLResponse`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/HITLResponse) - [`InterruptOnConfig`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/InterruptOnConfig) - [`HumanInTheLoopMiddleware`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/HumanInTheLoopMiddleware) - [`PIIMatch`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/PIIMatch) - [`PIIDetectionError`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/PIIDetectionError) - [`RedactionRule`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/RedactionRule) - [`ResolvedRedactionRule`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/ResolvedRedactionRule) - [`PIIMiddleware`](https://reference.langchain.com/python/langchain/agents/middleware/pii/PIIMiddleware) ## Functions - [`create_agent()`](https://reference.langchain.com/python/langchain/agents/factory/create_agent) - [`validate_retry_params()`](https://reference.langchain.com/python/langchain/agents/middleware/_retry/validate_retry_params) - [`should_retry_exception()`](https://reference.langchain.com/python/langchain/agents/middleware/_retry/should_retry_exception) - [`calculate_delay()`](https://reference.langchain.com/python/langchain/agents/middleware/_retry/calculate_delay) - [`glob_search()`](https://reference.langchain.com/python/langchain/agents/middleware/file_search/FilesystemFileSearchMiddleware/__init__/glob_search) - [`grep_search()`](https://reference.langchain.com/python/langchain/agents/middleware/file_search/FilesystemFileSearchMiddleware/__init__/grep_search) - [`write_todos()`](https://reference.langchain.com/python/langchain/agents/middleware/todo/write_todos) - [`hook_config()`](https://reference.langchain.com/python/langchain/agents/middleware/types/hook_config) - [`before_model()`](https://reference.langchain.com/python/langchain/agents/middleware/types/before_model) - [`after_model()`](https://reference.langchain.com/python/langchain/agents/middleware/types/after_model) - [`before_agent()`](https://reference.langchain.com/python/langchain/agents/middleware/types/before_agent) - [`after_agent()`](https://reference.langchain.com/python/langchain/agents/middleware/types/after_agent) - [`dynamic_prompt()`](https://reference.langchain.com/python/langchain/agents/middleware/types/dynamic_prompt) - [`wrap_model_call()`](https://reference.langchain.com/python/langchain/agents/middleware/types/wrap_model_call) - [`wrap_tool_call()`](https://reference.langchain.com/python/langchain/agents/middleware/types/wrap_tool_call) - [`shell_tool()`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/ShellToolMiddleware/__init__/shell_tool) - [`detect_email()`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/detect_email) - [`detect_credit_card()`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/detect_credit_card) - [`detect_ip()`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/detect_ip) - [`detect_mac_address()`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/detect_mac_address) - [`detect_url()`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/detect_url) - [`apply_strategy()`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/apply_strategy) - [`resolve_detector()`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/resolve_detector) - [`init_embeddings()`](https://reference.langchain.com/python/langchain/embeddings/base/init_embeddings) - [`init_chat_model()`](https://reference.langchain.com/python/langchain/chat_models/base/init_chat_model) ## Modules - [`langchain`](https://reference.langchain.com/python/langchain/langchain) - [`agents`](https://reference.langchain.com/python/langchain/agents) - [`structured_output`](https://reference.langchain.com/python/langchain/agents/structured_output) - [`factory`](https://reference.langchain.com/python/langchain/agents/factory) - [`middleware`](https://reference.langchain.com/python/langchain/agents/middleware) - [`tool_emulator`](https://reference.langchain.com/python/langchain/agents/middleware/tool_emulator) - [`summarization`](https://reference.langchain.com/python/langchain/agents/middleware/summarization) - [`file_search`](https://reference.langchain.com/python/langchain/agents/middleware/file_search) - [`model_fallback`](https://reference.langchain.com/python/langchain/agents/middleware/model_fallback) - [`model_call_limit`](https://reference.langchain.com/python/langchain/agents/middleware/model_call_limit) - [`todo`](https://reference.langchain.com/python/langchain/agents/middleware/todo) - [`tool_selection`](https://reference.langchain.com/python/langchain/agents/middleware/tool_selection) - [`context_editing`](https://reference.langchain.com/python/langchain/agents/middleware/context_editing) - [`types`](https://reference.langchain.com/python/langchain/agents/middleware/types) - [`shell_tool`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool) - [`tool_retry`](https://reference.langchain.com/python/langchain/agents/middleware/tool_retry) - [`tool_call_limit`](https://reference.langchain.com/python/langchain/agents/middleware/tool_call_limit) - [`model_retry`](https://reference.langchain.com/python/langchain/agents/middleware/model_retry) - [`human_in_the_loop`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop) - [`pii`](https://reference.langchain.com/python/langchain/agents/middleware/pii) - [`embeddings`](https://reference.langchain.com/python/langchain/embeddings) - [`base`](https://reference.langchain.com/python/langchain/embeddings/base) - [`chat_models`](https://reference.langchain.com/python/langchain/chat_models) - [`base`](https://reference.langchain.com/python/langchain/chat_models/base) - [`messages`](https://reference.langchain.com/python/langchain/messages) - [`tools`](https://reference.langchain.com/python/langchain/tools) - [`tool_node`](https://reference.langchain.com/python/langchain/tools/tool_node) - [`rate_limiters`](https://reference.langchain.com/python/langchain/rate_limiters) ## Types - [`ResponseFormat`](https://reference.langchain.com/python/langchain/agents/structured_output/ResponseFormat) - [`RetryOn`](https://reference.langchain.com/python/langchain/agents/middleware/_retry/RetryOn) - [`OnFailure`](https://reference.langchain.com/python/langchain/agents/middleware/_retry/OnFailure) - [`ContextSize`](https://reference.langchain.com/python/langchain/agents/middleware/summarization/ContextSize) - [`ModelCallResult`](https://reference.langchain.com/python/langchain/agents/middleware/types/ModelCallResult) - [`Decision`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/Decision) ## Constants - [`SchemaT`](https://reference.langchain.com/python/langchain/agents/structured_output/SchemaT) - [`SchemaKind`](https://reference.langchain.com/python/langchain/agents/structured_output/SchemaKind) - [`ai_message`](https://reference.langchain.com/python/langchain/agents/structured_output/StructuredOutputError/ai_message) - [`tool_names`](https://reference.langchain.com/python/langchain/agents/structured_output/MultipleStructuredOutputsError/tool_names) - [`ai_message`](https://reference.langchain.com/python/langchain/agents/structured_output/MultipleStructuredOutputsError/ai_message) - [`tool_name`](https://reference.langchain.com/python/langchain/agents/structured_output/StructuredOutputValidationError/tool_name) - [`source`](https://reference.langchain.com/python/langchain/agents/structured_output/StructuredOutputValidationError/source) - [`ai_message`](https://reference.langchain.com/python/langchain/agents/structured_output/StructuredOutputValidationError/ai_message) - [`schema`](https://reference.langchain.com/python/langchain/agents/structured_output/_SchemaSpec/schema) - [`name`](https://reference.langchain.com/python/langchain/agents/structured_output/_SchemaSpec/name) - [`description`](https://reference.langchain.com/python/langchain/agents/structured_output/_SchemaSpec/description) - [`schema_kind`](https://reference.langchain.com/python/langchain/agents/structured_output/_SchemaSpec/schema_kind) - [`json_schema`](https://reference.langchain.com/python/langchain/agents/structured_output/_SchemaSpec/json_schema) - [`strict`](https://reference.langchain.com/python/langchain/agents/structured_output/_SchemaSpec/strict) - [`schema`](https://reference.langchain.com/python/langchain/agents/structured_output/ToolStrategy/schema) - [`schema_specs`](https://reference.langchain.com/python/langchain/agents/structured_output/ToolStrategy/schema_specs) - [`tool_message_content`](https://reference.langchain.com/python/langchain/agents/structured_output/ToolStrategy/tool_message_content) - [`handle_errors`](https://reference.langchain.com/python/langchain/agents/structured_output/ToolStrategy/handle_errors) - [`schema`](https://reference.langchain.com/python/langchain/agents/structured_output/ProviderStrategy/schema) - [`schema_spec`](https://reference.langchain.com/python/langchain/agents/structured_output/ProviderStrategy/schema_spec) - [`schema`](https://reference.langchain.com/python/langchain/agents/structured_output/OutputToolBinding/schema) - [`schema_kind`](https://reference.langchain.com/python/langchain/agents/structured_output/OutputToolBinding/schema_kind) - [`tool`](https://reference.langchain.com/python/langchain/agents/structured_output/OutputToolBinding/tool) - [`schema`](https://reference.langchain.com/python/langchain/agents/structured_output/ProviderStrategyBinding/schema) - [`schema_kind`](https://reference.langchain.com/python/langchain/agents/structured_output/ProviderStrategyBinding/schema_kind) - [`schema`](https://reference.langchain.com/python/langchain/agents/structured_output/AutoStrategy/schema) - [`logger`](https://reference.langchain.com/python/langchain/agents/_subagent_transformer/logger) - [`name`](https://reference.langchain.com/python/langchain/agents/_subagent_transformer/SubagentRunStream/name) - [`cause`](https://reference.langchain.com/python/langchain/agents/_subagent_transformer/SubagentRunStream/cause) - [`name`](https://reference.langchain.com/python/langchain/agents/_subagent_transformer/AsyncSubagentRunStream/name) - [`cause`](https://reference.langchain.com/python/langchain/agents/_subagent_transformer/AsyncSubagentRunStream/cause) - [`supports_sync`](https://reference.langchain.com/python/langchain/agents/_subagent_transformer/SubagentTransformer/supports_sync) - [`model_response`](https://reference.langchain.com/python/langchain/agents/factory/_ComposedExtendedModelResponse/model_response) - [`commands`](https://reference.langchain.com/python/langchain/agents/factory/_ComposedExtendedModelResponse/commands) - [`STRUCTURED_OUTPUT_ERROR_TEMPLATE`](https://reference.langchain.com/python/langchain/agents/factory/STRUCTURED_OUTPUT_ERROR_TEMPLATE) - [`DYNAMIC_TOOL_ERROR_TEMPLATE`](https://reference.langchain.com/python/langchain/agents/factory/DYNAMIC_TOOL_ERROR_TEMPLATE) - [`FALLBACK_MODELS_WITH_STRUCTURED_OUTPUT`](https://reference.langchain.com/python/langchain/agents/factory/FALLBACK_MODELS_WITH_STRUCTURED_OUTPUT) - [`emulate_all`](https://reference.langchain.com/python/langchain/agents/middleware/tool_emulator/LLMToolEmulator/emulate_all) - [`tools_to_emulate`](https://reference.langchain.com/python/langchain/agents/middleware/tool_emulator/LLMToolEmulator/tools_to_emulate) - [`model`](https://reference.langchain.com/python/langchain/agents/middleware/tool_emulator/LLMToolEmulator/model) - [`TokenCounter`](https://reference.langchain.com/python/langchain/agents/middleware/summarization/TokenCounter) - [`DEFAULT_SUMMARY_PROMPT`](https://reference.langchain.com/python/langchain/agents/middleware/summarization/DEFAULT_SUMMARY_PROMPT) - [`ContextFraction`](https://reference.langchain.com/python/langchain/agents/middleware/summarization/ContextFraction) - [`ContextTokens`](https://reference.langchain.com/python/langchain/agents/middleware/summarization/ContextTokens) - [`ContextMessages`](https://reference.langchain.com/python/langchain/agents/middleware/summarization/ContextMessages) - [`model`](https://reference.langchain.com/python/langchain/agents/middleware/summarization/SummarizationMiddleware/model) - [`trigger`](https://reference.langchain.com/python/langchain/agents/middleware/summarization/SummarizationMiddleware/trigger) - [`keep`](https://reference.langchain.com/python/langchain/agents/middleware/summarization/SummarizationMiddleware/keep) - [`token_counter`](https://reference.langchain.com/python/langchain/agents/middleware/summarization/SummarizationMiddleware/token_counter) - [`summary_prompt`](https://reference.langchain.com/python/langchain/agents/middleware/summarization/SummarizationMiddleware/summary_prompt) - [`trim_tokens_to_summarize`](https://reference.langchain.com/python/langchain/agents/middleware/summarization/SummarizationMiddleware/trim_tokens_to_summarize) - [`root_path`](https://reference.langchain.com/python/langchain/agents/middleware/file_search/FilesystemFileSearchMiddleware/root_path) - [`use_ripgrep`](https://reference.langchain.com/python/langchain/agents/middleware/file_search/FilesystemFileSearchMiddleware/use_ripgrep) - [`max_file_size_bytes`](https://reference.langchain.com/python/langchain/agents/middleware/file_search/FilesystemFileSearchMiddleware/max_file_size_bytes) - [`glob_search`](https://reference.langchain.com/python/langchain/agents/middleware/file_search/FilesystemFileSearchMiddleware/glob_search) - [`grep_search`](https://reference.langchain.com/python/langchain/agents/middleware/file_search/FilesystemFileSearchMiddleware/grep_search) - [`tools`](https://reference.langchain.com/python/langchain/agents/middleware/file_search/FilesystemFileSearchMiddleware/tools) - [`models`](https://reference.langchain.com/python/langchain/agents/middleware/model_fallback/ModelFallbackMiddleware/models) - [`thread_model_call_count`](https://reference.langchain.com/python/langchain/agents/middleware/model_call_limit/ModelCallLimitState/thread_model_call_count) - [`run_model_call_count`](https://reference.langchain.com/python/langchain/agents/middleware/model_call_limit/ModelCallLimitState/run_model_call_count) - [`thread_count`](https://reference.langchain.com/python/langchain/agents/middleware/model_call_limit/ModelCallLimitExceededError/thread_count) - [`run_count`](https://reference.langchain.com/python/langchain/agents/middleware/model_call_limit/ModelCallLimitExceededError/run_count) - [`thread_limit`](https://reference.langchain.com/python/langchain/agents/middleware/model_call_limit/ModelCallLimitExceededError/thread_limit) - [`run_limit`](https://reference.langchain.com/python/langchain/agents/middleware/model_call_limit/ModelCallLimitExceededError/run_limit) - [`state_schema`](https://reference.langchain.com/python/langchain/agents/middleware/model_call_limit/ModelCallLimitMiddleware/state_schema) - [`thread_limit`](https://reference.langchain.com/python/langchain/agents/middleware/model_call_limit/ModelCallLimitMiddleware/thread_limit) - [`run_limit`](https://reference.langchain.com/python/langchain/agents/middleware/model_call_limit/ModelCallLimitMiddleware/run_limit) - [`exit_behavior`](https://reference.langchain.com/python/langchain/agents/middleware/model_call_limit/ModelCallLimitMiddleware/exit_behavior) - [`SHELL_TEMP_PREFIX`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/SHELL_TEMP_PREFIX) - [`command_timeout`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/BaseExecutionPolicy/command_timeout) - [`startup_timeout`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/BaseExecutionPolicy/startup_timeout) - [`termination_timeout`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/BaseExecutionPolicy/termination_timeout) - [`max_output_lines`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/BaseExecutionPolicy/max_output_lines) - [`max_output_bytes`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/BaseExecutionPolicy/max_output_bytes) - [`cpu_time_seconds`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/HostExecutionPolicy/cpu_time_seconds) - [`memory_bytes`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/HostExecutionPolicy/memory_bytes) - [`create_process_group`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/HostExecutionPolicy/create_process_group) - [`binary`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/CodexSandboxExecutionPolicy/binary) - [`platform`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/CodexSandboxExecutionPolicy/platform) - [`config_overrides`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/CodexSandboxExecutionPolicy/config_overrides) - [`binary`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/DockerExecutionPolicy/binary) - [`image`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/DockerExecutionPolicy/image) - [`remove_container_on_exit`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/DockerExecutionPolicy/remove_container_on_exit) - [`network_enabled`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/DockerExecutionPolicy/network_enabled) - [`extra_run_args`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/DockerExecutionPolicy/extra_run_args) - [`memory_bytes`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/DockerExecutionPolicy/memory_bytes) - [`cpu_time_seconds`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/DockerExecutionPolicy/cpu_time_seconds) - [`cpus`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/DockerExecutionPolicy/cpus) - [`read_only_rootfs`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/DockerExecutionPolicy/read_only_rootfs) - [`user`](https://reference.langchain.com/python/langchain/agents/middleware/_execution/DockerExecutionPolicy/user) - [`content`](https://reference.langchain.com/python/langchain/agents/middleware/todo/Todo/content) - [`status`](https://reference.langchain.com/python/langchain/agents/middleware/todo/Todo/status) - [`todos`](https://reference.langchain.com/python/langchain/agents/middleware/todo/PlanningState/todos) - [`todos`](https://reference.langchain.com/python/langchain/agents/middleware/todo/WriteTodosInput/todos) - [`WRITE_TODOS_TOOL_DESCRIPTION`](https://reference.langchain.com/python/langchain/agents/middleware/todo/WRITE_TODOS_TOOL_DESCRIPTION) - [`WRITE_TODOS_SYSTEM_PROMPT`](https://reference.langchain.com/python/langchain/agents/middleware/todo/WRITE_TODOS_SYSTEM_PROMPT) - [`state_schema`](https://reference.langchain.com/python/langchain/agents/middleware/todo/TodoListMiddleware/state_schema) - [`system_prompt`](https://reference.langchain.com/python/langchain/agents/middleware/todo/TodoListMiddleware/system_prompt) - [`tool_description`](https://reference.langchain.com/python/langchain/agents/middleware/todo/TodoListMiddleware/tool_description) - [`tools`](https://reference.langchain.com/python/langchain/agents/middleware/todo/TodoListMiddleware/tools) - [`logger`](https://reference.langchain.com/python/langchain/agents/middleware/tool_selection/logger) - [`DEFAULT_SYSTEM_PROMPT`](https://reference.langchain.com/python/langchain/agents/middleware/tool_selection/DEFAULT_SYSTEM_PROMPT) - [`available_tools`](https://reference.langchain.com/python/langchain/agents/middleware/tool_selection/_SelectionRequest/available_tools) - [`system_message`](https://reference.langchain.com/python/langchain/agents/middleware/tool_selection/_SelectionRequest/system_message) - [`last_user_message`](https://reference.langchain.com/python/langchain/agents/middleware/tool_selection/_SelectionRequest/last_user_message) - [`model`](https://reference.langchain.com/python/langchain/agents/middleware/tool_selection/_SelectionRequest/model) - [`valid_tool_names`](https://reference.langchain.com/python/langchain/agents/middleware/tool_selection/_SelectionRequest/valid_tool_names) - [`system_prompt`](https://reference.langchain.com/python/langchain/agents/middleware/tool_selection/LLMToolSelectorMiddleware/system_prompt) - [`max_tools`](https://reference.langchain.com/python/langchain/agents/middleware/tool_selection/LLMToolSelectorMiddleware/max_tools) - [`always_include`](https://reference.langchain.com/python/langchain/agents/middleware/tool_selection/LLMToolSelectorMiddleware/always_include) - [`model`](https://reference.langchain.com/python/langchain/agents/middleware/tool_selection/LLMToolSelectorMiddleware/model) - [`DEFAULT_TOOL_PLACEHOLDER`](https://reference.langchain.com/python/langchain/agents/middleware/context_editing/DEFAULT_TOOL_PLACEHOLDER) - [`TokenCounter`](https://reference.langchain.com/python/langchain/agents/middleware/context_editing/TokenCounter) - [`trigger`](https://reference.langchain.com/python/langchain/agents/middleware/context_editing/ClearToolUsesEdit/trigger) - [`clear_at_least`](https://reference.langchain.com/python/langchain/agents/middleware/context_editing/ClearToolUsesEdit/clear_at_least) - [`keep`](https://reference.langchain.com/python/langchain/agents/middleware/context_editing/ClearToolUsesEdit/keep) - [`clear_tool_inputs`](https://reference.langchain.com/python/langchain/agents/middleware/context_editing/ClearToolUsesEdit/clear_tool_inputs) - [`exclude_tools`](https://reference.langchain.com/python/langchain/agents/middleware/context_editing/ClearToolUsesEdit/exclude_tools) - [`placeholder`](https://reference.langchain.com/python/langchain/agents/middleware/context_editing/ClearToolUsesEdit/placeholder) - [`edits`](https://reference.langchain.com/python/langchain/agents/middleware/context_editing/ContextEditingMiddleware/edits) - [`token_count_method`](https://reference.langchain.com/python/langchain/agents/middleware/context_editing/ContextEditingMiddleware/token_count_method) - [`JumpTo`](https://reference.langchain.com/python/langchain/agents/middleware/types/JumpTo) - [`ResponseT`](https://reference.langchain.com/python/langchain/agents/middleware/types/ResponseT) - [`model`](https://reference.langchain.com/python/langchain/agents/middleware/types/_ModelRequestOverrides/model) - [`system_message`](https://reference.langchain.com/python/langchain/agents/middleware/types/_ModelRequestOverrides/system_message) - [`messages`](https://reference.langchain.com/python/langchain/agents/middleware/types/_ModelRequestOverrides/messages) - [`tool_choice`](https://reference.langchain.com/python/langchain/agents/middleware/types/_ModelRequestOverrides/tool_choice) - [`tools`](https://reference.langchain.com/python/langchain/agents/middleware/types/_ModelRequestOverrides/tools) - [`response_format`](https://reference.langchain.com/python/langchain/agents/middleware/types/_ModelRequestOverrides/response_format) - [`model_settings`](https://reference.langchain.com/python/langchain/agents/middleware/types/_ModelRequestOverrides/model_settings) - [`state`](https://reference.langchain.com/python/langchain/agents/middleware/types/_ModelRequestOverrides/state) - [`model`](https://reference.langchain.com/python/langchain/agents/middleware/types/ModelRequest/model) - [`messages`](https://reference.langchain.com/python/langchain/agents/middleware/types/ModelRequest/messages) - [`system_message`](https://reference.langchain.com/python/langchain/agents/middleware/types/ModelRequest/system_message) - [`tool_choice`](https://reference.langchain.com/python/langchain/agents/middleware/types/ModelRequest/tool_choice) - [`tools`](https://reference.langchain.com/python/langchain/agents/middleware/types/ModelRequest/tools) - [`response_format`](https://reference.langchain.com/python/langchain/agents/middleware/types/ModelRequest/response_format) - [`state`](https://reference.langchain.com/python/langchain/agents/middleware/types/ModelRequest/state) - [`runtime`](https://reference.langchain.com/python/langchain/agents/middleware/types/ModelRequest/runtime) - [`model_settings`](https://reference.langchain.com/python/langchain/agents/middleware/types/ModelRequest/model_settings) - [`system_prompt`](https://reference.langchain.com/python/langchain/agents/middleware/types/ModelRequest/system_prompt) - [`result`](https://reference.langchain.com/python/langchain/agents/middleware/types/ModelResponse/result) - [`structured_response`](https://reference.langchain.com/python/langchain/agents/middleware/types/ModelResponse/structured_response) - [`model_response`](https://reference.langchain.com/python/langchain/agents/middleware/types/ExtendedModelResponse/model_response) - [`command`](https://reference.langchain.com/python/langchain/agents/middleware/types/ExtendedModelResponse/command) - [`input`](https://reference.langchain.com/python/langchain/agents/middleware/types/OmitFromSchema/input) - [`output`](https://reference.langchain.com/python/langchain/agents/middleware/types/OmitFromSchema/output) - [`OmitFromInput`](https://reference.langchain.com/python/langchain/agents/middleware/types/OmitFromInput) - [`OmitFromOutput`](https://reference.langchain.com/python/langchain/agents/middleware/types/OmitFromOutput) - [`PrivateStateAttr`](https://reference.langchain.com/python/langchain/agents/middleware/types/PrivateStateAttr) - [`messages`](https://reference.langchain.com/python/langchain/agents/middleware/types/AgentState/messages) - [`jump_to`](https://reference.langchain.com/python/langchain/agents/middleware/types/AgentState/jump_to) - [`structured_response`](https://reference.langchain.com/python/langchain/agents/middleware/types/AgentState/structured_response) - [`messages`](https://reference.langchain.com/python/langchain/agents/middleware/types/_InputAgentState/messages) - [`messages`](https://reference.langchain.com/python/langchain/agents/middleware/types/_OutputAgentState/messages) - [`structured_response`](https://reference.langchain.com/python/langchain/agents/middleware/types/_OutputAgentState/structured_response) - [`StateT`](https://reference.langchain.com/python/langchain/agents/middleware/types/StateT) - [`StateT_co`](https://reference.langchain.com/python/langchain/agents/middleware/types/StateT_co) - [`StateT_contra`](https://reference.langchain.com/python/langchain/agents/middleware/types/StateT_contra) - [`state_schema`](https://reference.langchain.com/python/langchain/agents/middleware/types/AgentMiddleware/state_schema) - [`tools`](https://reference.langchain.com/python/langchain/agents/middleware/types/AgentMiddleware/tools) - [`transformers`](https://reference.langchain.com/python/langchain/agents/middleware/types/AgentMiddleware/transformers) - [`name`](https://reference.langchain.com/python/langchain/agents/middleware/types/AgentMiddleware/name) - [`CallableT`](https://reference.langchain.com/python/langchain/agents/middleware/types/CallableT) - [`LOGGER`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/LOGGER) - [`DEFAULT_TOOL_DESCRIPTION`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/DEFAULT_TOOL_DESCRIPTION) - [`SHELL_TOOL_NAME`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/SHELL_TOOL_NAME) - [`session`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/_SessionResources/session) - [`tempdir`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/_SessionResources/tempdir) - [`policy`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/_SessionResources/policy) - [`finalizer`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/_SessionResources/finalizer) - [`shell_session_resources`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/ShellToolState/shell_session_resources) - [`output`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/CommandExecutionResult/output) - [`exit_code`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/CommandExecutionResult/exit_code) - [`timed_out`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/CommandExecutionResult/timed_out) - [`truncated_by_lines`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/CommandExecutionResult/truncated_by_lines) - [`truncated_by_bytes`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/CommandExecutionResult/truncated_by_bytes) - [`total_lines`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/CommandExecutionResult/total_lines) - [`total_bytes`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/CommandExecutionResult/total_bytes) - [`command`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/_ShellToolInput/command) - [`restart`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/_ShellToolInput/restart) - [`runtime`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/_ShellToolInput/runtime) - [`state_schema`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/ShellToolMiddleware/state_schema) - [`tools`](https://reference.langchain.com/python/langchain/agents/middleware/shell_tool/ShellToolMiddleware/tools) - [`max_retries`](https://reference.langchain.com/python/langchain/agents/middleware/tool_retry/ToolRetryMiddleware/max_retries) - [`tools`](https://reference.langchain.com/python/langchain/agents/middleware/tool_retry/ToolRetryMiddleware/tools) - [`retry_on`](https://reference.langchain.com/python/langchain/agents/middleware/tool_retry/ToolRetryMiddleware/retry_on) - [`on_failure`](https://reference.langchain.com/python/langchain/agents/middleware/tool_retry/ToolRetryMiddleware/on_failure) - [`backoff_factor`](https://reference.langchain.com/python/langchain/agents/middleware/tool_retry/ToolRetryMiddleware/backoff_factor) - [`initial_delay`](https://reference.langchain.com/python/langchain/agents/middleware/tool_retry/ToolRetryMiddleware/initial_delay) - [`max_delay`](https://reference.langchain.com/python/langchain/agents/middleware/tool_retry/ToolRetryMiddleware/max_delay) - [`jitter`](https://reference.langchain.com/python/langchain/agents/middleware/tool_retry/ToolRetryMiddleware/jitter) - [`ExitBehavior`](https://reference.langchain.com/python/langchain/agents/middleware/tool_call_limit/ExitBehavior) - [`thread_tool_call_count`](https://reference.langchain.com/python/langchain/agents/middleware/tool_call_limit/ToolCallLimitState/thread_tool_call_count) - [`run_tool_call_count`](https://reference.langchain.com/python/langchain/agents/middleware/tool_call_limit/ToolCallLimitState/run_tool_call_count) - [`thread_count`](https://reference.langchain.com/python/langchain/agents/middleware/tool_call_limit/ToolCallLimitExceededError/thread_count) - [`run_count`](https://reference.langchain.com/python/langchain/agents/middleware/tool_call_limit/ToolCallLimitExceededError/run_count) - [`thread_limit`](https://reference.langchain.com/python/langchain/agents/middleware/tool_call_limit/ToolCallLimitExceededError/thread_limit) - [`run_limit`](https://reference.langchain.com/python/langchain/agents/middleware/tool_call_limit/ToolCallLimitExceededError/run_limit) - [`tool_name`](https://reference.langchain.com/python/langchain/agents/middleware/tool_call_limit/ToolCallLimitExceededError/tool_name) - [`state_schema`](https://reference.langchain.com/python/langchain/agents/middleware/tool_call_limit/ToolCallLimitMiddleware/state_schema) - [`tool_name`](https://reference.langchain.com/python/langchain/agents/middleware/tool_call_limit/ToolCallLimitMiddleware/tool_name) - [`thread_limit`](https://reference.langchain.com/python/langchain/agents/middleware/tool_call_limit/ToolCallLimitMiddleware/thread_limit) - [`run_limit`](https://reference.langchain.com/python/langchain/agents/middleware/tool_call_limit/ToolCallLimitMiddleware/run_limit) - [`exit_behavior`](https://reference.langchain.com/python/langchain/agents/middleware/tool_call_limit/ToolCallLimitMiddleware/exit_behavior) - [`name`](https://reference.langchain.com/python/langchain/agents/middleware/tool_call_limit/ToolCallLimitMiddleware/name) - [`max_retries`](https://reference.langchain.com/python/langchain/agents/middleware/model_retry/ModelRetryMiddleware/max_retries) - [`tools`](https://reference.langchain.com/python/langchain/agents/middleware/model_retry/ModelRetryMiddleware/tools) - [`retry_on`](https://reference.langchain.com/python/langchain/agents/middleware/model_retry/ModelRetryMiddleware/retry_on) - [`on_failure`](https://reference.langchain.com/python/langchain/agents/middleware/model_retry/ModelRetryMiddleware/on_failure) - [`backoff_factor`](https://reference.langchain.com/python/langchain/agents/middleware/model_retry/ModelRetryMiddleware/backoff_factor) - [`initial_delay`](https://reference.langchain.com/python/langchain/agents/middleware/model_retry/ModelRetryMiddleware/initial_delay) - [`max_delay`](https://reference.langchain.com/python/langchain/agents/middleware/model_retry/ModelRetryMiddleware/max_delay) - [`jitter`](https://reference.langchain.com/python/langchain/agents/middleware/model_retry/ModelRetryMiddleware/jitter) - [`name`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/Action/name) - [`args`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/Action/args) - [`name`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/ActionRequest/name) - [`args`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/ActionRequest/args) - [`description`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/ActionRequest/description) - [`DecisionType`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/DecisionType) - [`action_name`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/ReviewConfig/action_name) - [`allowed_decisions`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/ReviewConfig/allowed_decisions) - [`args_schema`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/ReviewConfig/args_schema) - [`action_requests`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/HITLRequest/action_requests) - [`review_configs`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/HITLRequest/review_configs) - [`type`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/ApproveDecision/type) - [`type`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/EditDecision/type) - [`edited_action`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/EditDecision/edited_action) - [`type`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/RejectDecision/type) - [`message`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/RejectDecision/message) - [`type`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/RespondDecision/type) - [`message`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/RespondDecision/message) - [`decisions`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/HITLResponse/decisions) - [`allowed_decisions`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/InterruptOnConfig/allowed_decisions) - [`description`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/InterruptOnConfig/description) - [`args_schema`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/InterruptOnConfig/args_schema) - [`when`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/InterruptOnConfig/when) - [`interrupt_on`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/HumanInTheLoopMiddleware/interrupt_on) - [`description_prefix`](https://reference.langchain.com/python/langchain/agents/middleware/human_in_the_loop/HumanInTheLoopMiddleware/description_prefix) - [`RedactionStrategy`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/RedactionStrategy) - [`type`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/PIIMatch/type) - [`value`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/PIIMatch/value) - [`start`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/PIIMatch/start) - [`end`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/PIIMatch/end) - [`pii_type`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/PIIDetectionError/pii_type) - [`matches`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/PIIDetectionError/matches) - [`Detector`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/Detector) - [`BUILTIN_DETECTORS`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/BUILTIN_DETECTORS) - [`pii_type`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/RedactionRule/pii_type) - [`strategy`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/RedactionRule/strategy) - [`detector`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/RedactionRule/detector) - [`pii_type`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/ResolvedRedactionRule/pii_type) - [`strategy`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/ResolvedRedactionRule/strategy) - [`detector`](https://reference.langchain.com/python/langchain/agents/middleware/_redaction/ResolvedRedactionRule/detector) - [`before_builtins`](https://reference.langchain.com/python/langchain/agents/middleware/pii/_PIIStreamTransformer/before_builtins) - [`required_stream_modes`](https://reference.langchain.com/python/langchain/agents/middleware/pii/_PIIStreamTransformer/required_stream_modes) - [`apply_to_input`](https://reference.langchain.com/python/langchain/agents/middleware/pii/PIIMiddleware/apply_to_input) - [`apply_to_output`](https://reference.langchain.com/python/langchain/agents/middleware/pii/PIIMiddleware/apply_to_output) - [`apply_to_tool_results`](https://reference.langchain.com/python/langchain/agents/middleware/pii/PIIMiddleware/apply_to_tool_results) - [`pii_type`](https://reference.langchain.com/python/langchain/agents/middleware/pii/PIIMiddleware/pii_type) - [`strategy`](https://reference.langchain.com/python/langchain/agents/middleware/pii/PIIMiddleware/strategy) - [`detector`](https://reference.langchain.com/python/langchain/agents/middleware/pii/PIIMiddleware/detector) - [`transformers`](https://reference.langchain.com/python/langchain/agents/middleware/pii/PIIMiddleware/transformers) - [`name`](https://reference.langchain.com/python/langchain/agents/middleware/pii/PIIMiddleware/name) - [`InputType`](https://reference.langchain.com/python/langchain/chat_models/base/_ConfigurableModel/InputType)