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_CallableReturningToolResponse Class — langchain Architecture

Architecture documentation for the _CallableReturningToolResponse class in types.py from the langchain codebase.

Class python

Entity Profile

Dependency Diagram

graph TD
  870db102_f216_5003_5791_f7e62311dfae["_CallableReturningToolResponse"]
  fb1284e2_76fc_661f_c16d_e084e8c2b175["types.py"]
  870db102_f216_5003_5791_f7e62311dfae -->|defined in| fb1284e2_76fc_661f_c16d_e084e8c2b175
  95ff8012_21c6_5048_410b_7cbd682624ff["__call__()"]
  870db102_f216_5003_5791_f7e62311dfae -->|method| 95ff8012_21c6_5048_410b_7cbd682624ff

Relationship Graph

Source Code

libs/langchain_v1/langchain/agents/middleware/types.py lines 837–850

class _CallableReturningToolResponse(Protocol):
    """Callable for tool call interception with handler callback.

    Receives handler callback to execute tool and returns final `ToolMessage` or
    `Command`.
    """

    def __call__(
        self,
        request: ToolCallRequest,
        handler: Callable[[ToolCallRequest], ToolMessage | Command[Any]],
    ) -> ToolMessage | Command[Any]:
        """Intercept tool execution via handler callback."""
        ...

Defined In

Source

Frequently Asked Questions

What is the _CallableReturningToolResponse class?
_CallableReturningToolResponse is a class in the langchain codebase, defined in libs/langchain_v1/langchain/agents/middleware/types.py.
Where is _CallableReturningToolResponse defined?
_CallableReturningToolResponse is defined in libs/langchain_v1/langchain/agents/middleware/types.py at line 837.

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