I need to classify all columns in this dataset by their role. Let me start by getting a comprehensive view of the columns across all tables. ```json { "action": "tool_call", "reasoning": "To classify columns by role (identifiers, categorical dimensions, numeric metrics, dates/times), I need to examine the column metadata across all tables. The analytics.column_overview view contains semantic_role, rough_kind, and key_role which will help classify columns. I'll query this metadata to get a complete picture.", "tool": "query_sql", "args": { "sql": "SELECT semantic_role, rough_kind, key_role, aggregation_role, COUNT(*) as column_count, COUNT(DISTINCT table_name) as table_count FROM analytics.column_overview GROUP BY semantic_role, rough_kind, key_role, aggregation_role ORDER BY column_count DESC", "purpose": "Get high-level distribution of column roles to understand the classification landscape" } } ```