I need to identify categorical columns across the dataset and count their distinct values. Let me start by examining the column metadata to find categorical columns. ```json { "action": "tool_call", "reasoning": "I need to identify which columns are categorical across all tables. The analytics.column_overview metadata view contains semantic_role and rough_kind fields that will help identify categorical columns. I'll query this to find all categorical columns, then count their distinct values.", "tool": "query_sql", "args": { "sql": "SELECT table_name, column_name, phys_type, semantic_role, rough_kind, distinct_count, approx_distinct_count FROM analytics.column_overview WHERE rough_kind IN ('categorical', 'enum') OR semantic_role IN ('category', 'label', 'tag') ORDER BY table_name, column_name", "purpose": "Identify all categorical columns across the dataset with their distinct value counts", "source": "raw" } } ```