on_tool_end() — langchain Function Reference

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

Function python Observability Tracers calls 3 called by 1

Entity Profile

Observability→ Tracers→ on_tool_end() — langchain Function Reference

Dependency Diagram

graph TD
  3c301f83_2f92_47da_cfb1_097c993f88fb["on_tool_end()"]
  0f6b3261_31fa_c34e_ca33_cb141bdf78ff["BaseTracer"]
  3c301f83_2f92_47da_cfb1_097c993f88fb -->|defined in| 0f6b3261_31fa_c34e_ca33_cb141bdf78ff
  7bd5eb03_6d13_dcf0_56f3_cb5d1f0ce44d["on_tool_end()"]
  7bd5eb03_6d13_dcf0_56f3_cb5d1f0ce44d -->|calls| 3c301f83_2f92_47da_cfb1_097c993f88fb
  9191b24f_a202_df21_16c5_e2608083aef8["_end_trace()"]
  3c301f83_2f92_47da_cfb1_097c993f88fb -->|calls| 9191b24f_a202_df21_16c5_e2608083aef8
  389d2c9d_1f7b_6f21_5827_0f636aa0e114["_on_tool_end()"]
  3c301f83_2f92_47da_cfb1_097c993f88fb -->|calls| 389d2c9d_1f7b_6f21_5827_0f636aa0e114
  7bd5eb03_6d13_dcf0_56f3_cb5d1f0ce44d["on_tool_end()"]
  3c301f83_2f92_47da_cfb1_097c993f88fb -->|calls| 7bd5eb03_6d13_dcf0_56f3_cb5d1f0ce44d
  style 3c301f83_2f92_47da_cfb1_097c993f88fb fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/tracers/base.py lines 388–405

    def on_tool_end(self, output: Any, *, run_id: UUID, **kwargs: Any) -> Run:
        """End a trace for a tool run.

        Args:
            output: The output for the tool.
            run_id: The run ID.
            **kwargs: Additional arguments.

        Returns:
            The run.
        """
        tool_run = self._complete_tool_run(
            output=output,
            run_id=run_id,
        )
        self._end_trace(tool_run)
        self._on_tool_end(tool_run)
        return tool_run