Args:
            output (str): The output of the tool.
        """
        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,
        )
[docs]    async def on_tool_error(
        self,
        error: BaseException,
        **kwargs: Any,
    ) -> None:
        """Run when tool errors.
        Args:
            error (Exception or KeyboardInterrupt): The error.
        """
        await _ahandle_event(
            self.handlers,
            "on_tool_error",
            "ignore_agent",
            error,
            run_id=self.run_id,
            parent_run_id=self.parent_run_id,
            tags=self.tags,
            **kwargs,
        )
[docs]class CallbackManagerForRetrieverRun(ParentRunManager, RetrieverManagerMixin):
    """Callback manager for retriever run."""
[docs]    def on_retriever_end(
        self,
        documents: Sequence[Document],
        **kwargs: Any,
    ) -> None:
        """Run when retriever ends running."""
        _handle_event(
            self.handlers,
            "on_retriever_end",
            "ignore_retriever",
            documents,
            run_id=self.run_id,
            parent_run_id=self.parent_run_id,
            tags=self.tags,
            **kwargs,
        )
[docs]    def on_retriever_error(
        self,
        error: BaseException,
        **kwargs: Any,
    ) -> None:
        """Run when retriever errors."""
        _handle_event(