on_tool_end() — langchain Function Reference

Architecture documentation for the on_tool_end() function in manager.py from the langchain codebase.

Function python Observability CallbackManager calls 2 called by 1

Entity Profile

Observability→ CallbackManager→ on_tool_end() — langchain Function Reference

Dependency Diagram

graph TD
  73c64fa8_8671_57c1_b764_0e1ee3c5a51b["on_tool_end()"]
  4bbdce53_aee3_a4dd_64c9_5813ff30b559["AsyncCallbackManagerForToolRun"]
  73c64fa8_8671_57c1_b764_0e1ee3c5a51b -->|defined in| 4bbdce53_aee3_a4dd_64c9_5813ff30b559
  b9e1e1b1_29a3_f8f4_77f9_b2d38254e1c6["on_tool_end()"]
  b9e1e1b1_29a3_f8f4_77f9_b2d38254e1c6 -->|calls| 73c64fa8_8671_57c1_b764_0e1ee3c5a51b
  b9e1e1b1_29a3_f8f4_77f9_b2d38254e1c6["on_tool_end()"]
  73c64fa8_8671_57c1_b764_0e1ee3c5a51b -->|calls| b9e1e1b1_29a3_f8f4_77f9_b2d38254e1c6
  3a243d21_72d1_dca9_f7be_acbb482b9f86["ahandle_event()"]
  73c64fa8_8671_57c1_b764_0e1ee3c5a51b -->|calls| 3a243d21_72d1_dca9_f7be_acbb482b9f86
  style 73c64fa8_8671_57c1_b764_0e1ee3c5a51b fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/callbacks/manager.py lines 1128–1147

    async def on_tool_end(self, output: Any, **kwargs: Any) -> None:
        """Async run when the tool ends running.

        Args:
            output: The output of the tool.
            **kwargs: Additional keyword arguments.

        """
        if not self.handlers:
            return
        await ahandle_event(
            self.handlers,
            "on_tool_end",
            "ignore_agent",
            output,
            run_id=self.run_id,
            parent_run_id=self.parent_run_id,
            tags=self.tags,
            **kwargs,
        )