```json { "action": "tool_call", "reasoning": "The question asks for columns, data types, and meanings across the dataset. The card shows two tables (raw.ittf_rankings and raw.ittf_rankings_women) with 15 columns each. I'll use inspect_columns to get detailed metadata including types and semantic roles for both tables, starting with the first table.", "tool": "inspect_columns", "args": { "table": "raw.ittf_rankings" } } ```