```json { "action": "tool_call", "reasoning": "I have the column metadata showing phys_type, semantic_role, and rough_kind for all columns. Now I need to query the actual data types and characteristics to properly classify them. The metadata shows many columns as 'object' type, but I need to determine which are truly numeric vs text. I'll query the raw table to get precise type information and sample values to make accurate classifications.", "tool": "query_sql", "args": { "sql": "SELECT column_name, data_type, is_nullable FROM information_schema.columns WHERE table_name = 'ai_supercomputers' AND table_schema = 'raw' ORDER BY ordinal_position", "purpose": "Get precise data types for all columns to classify them accurately", "source": "raw" } } ```