```json { "action": "tool_call", "reasoning": "The question asks for a classification of all columns across both tables. The dataset card shows 15 columns per table with some overlap. I should use inspect_columns to get detailed metadata (semantic_role, rough_kind, phys_type) for both tables, which will provide the authoritative classification. I'll start with raw.ittf_rankings to see all its columns' metadata.", "tool": "inspect_columns", "args": { "table": "raw.ittf_rankings" } } ```