```json { "action": "tool_call", "reasoning": "I have the first 30 columns from inspect_columns and a partial list from step-2, but the table has 69 columns total. I need to get the complete list with all columns, their types, and semantic roles. I'll call inspect_columns without specifying columns to get all of them.", "tool": "inspect_columns", "args": { "table": "epoch_ai_benchmarks" } } ```