langchain/tools/powerbi/tool.py/ListPowerBITool/_run
class ListPowerBITool:    def _run(
        self,
        tool_input: Optional[str] = None,
        run_manager: Optional[CallbackManagerForToolRun] = None,
    ) -> str:
        """Get the names of the tables."""
        return ", ".join(self.powerbi.get_table_names())