```json { "action": "tool_call", "reasoning": "The dataset card shows raw.titanic has 16 columns. To classify them properly (identifiers, categorical dimensions, numeric metrics, dates/times), I need detailed metadata including semantic_role, rough_kind, and phys_type for all columns. inspect_columns will give me this information efficiently in one call.", "tool": "inspect_columns", "args": { "table": "titanic" } } ```