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JavaScript@langchain/langgraph-sdkreactInferAgentToolCalls
Type●Since v1.4

InferAgentToolCalls

Extract tool calls type from an agent's tools. Converts the tools array to a discriminated union of tool calls.

This handles both tuple types (e.g., readonly [Tool1, Tool2]) and array-of-union types (e.g., readonly (Tool1 | Tool2)[]) which is how createAgent captures tool types.

Copy
InferAgentToolCalls: ExtractAgentConfig<
  T
>["Tools"] extends readonly Tool[]  ToolCallFromAgentTool<Tool> extends never  DefaultToolCall : ToolCallFromAgentTool<Tool> : DefaultToolCall

Used in Docs

  • Frontend

Example

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const agent = createAgent({ tools: [getWeather, search], ... });
type ToolCalls = InferAgentToolCalls<typeof agent>;
// ToolCalls is:
// | { name: "get_weather"; args: { location: string }; id?: string }
// | { name: "search"; args: { query: string }; id?: string }
View source on GitHub