# CallbackManagerForToolRun

> **Class** in `langchain_core`

📖 [View in docs](https://reference.langchain.com/python/langchain-core/callbacks/manager/CallbackManagerForToolRun)

Callback manager for tool run.

## Signature

```python
CallbackManagerForToolRun(
    self,
    *,
    run_id: UUID,
    handlers: list[BaseCallbackHandler],
    inheritable_handlers: list[BaseCallbackHandler],
    parent_run_id: UUID | None = None,
    tags: list[str] | None = None,
    inheritable_tags: list[str] | None = None,
    metadata: dict[str, Any] | None = None,
    inheritable_metadata: dict[str, Any] | None = None,
)
```

## Extends

- `ParentRunManager`
- `ToolManagerMixin`

## Methods

- [`on_tool_end()`](https://reference.langchain.com/python/langchain-core/callbacks/manager/CallbackManagerForToolRun/on_tool_end)
- [`on_tool_error()`](https://reference.langchain.com/python/langchain-core/callbacks/manager/CallbackManagerForToolRun/on_tool_error)

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[View source on GitHub](https://github.com/langchain-ai/langchain/blob/f0c5a28fa05adcda89aebcb449d897245ab21fa4/libs/core/langchain_core/callbacks/manager.py#L1052)