I need to analyze the column classifications across all tables in this dataset. The evidence I already have shows column metadata for several tables, but I should get a complete picture across all tables. Let me query the metadata to get a comprehensive breakdown of all columns by their semantic roles. ```json { "action": "tool_call", "reasoning": "I have partial column metadata from inspect_columns, but I need a complete breakdown of ALL columns across ALL tables by their semantic roles (identifier, measure, temporal, etc.). The meta.columns table contains this classification data for the entire dataset.", "tool": "query_sql", "args": { "sql": "SELECT semantic_role, COUNT(*) as column_count, COUNT(DISTINCT table_name) as table_count FROM meta.columns GROUP BY semantic_role ORDER BY column_count DESC", "purpose": "Get overall distribution of columns by semantic role across all tables" } } ```