```json { "action": "tool_call", "reasoning": "I have column metadata for both tables from prior inspect_columns calls (steps 3, 4, 6, 7), but these only show column_name, phys_type, and semantic_role. The question asks what each column 'means' — which requires descriptions. The inspect_columns tool can provide richer metadata including descriptions when called with specific columns. I'll call it without the columns parameter to get full detail (including descriptions) for all columns in each table, starting with adsl.", "tool": "inspect_columns", "args": { "table": "adsl" } } ```