```json { "action": "tool_call", "reasoning": "The question asks for columns, their data types, and meanings across the dataset. The card shows 2 tables (raw.fighters and raw.popular_matches) with 14 and 23 columns respectively. I'll use inspect_columns on each table to get detailed metadata including types and semantic roles that explain what each column means.", "tool": "inspect_columns", "args": { "table": "raw.fighters" } } ```