```json { "action": "tool_call", "reasoning": "The question asks for columns, their data types, and meanings across the dataset. The card shows 10 tables with 30-31 columns each. I'll start by inspecting the largest/most complete table (raw.cleandata_v2 with 31 columns) to get a representative view of the schema and column semantics.", "tool": "inspect_columns", "args": { "table": "raw.cleandata_v2" } } ```