I need to identify all categorical columns across the tables and count their distinct values. Let me start by getting a comprehensive view of the columns and their types. ```json { "action": "tool_call", "reasoning": "I need to see all columns across all tables with their types and semantic roles to identify which are categorical. The inspect_columns tool will give me this metadata for each table, starting with the largest table sales_pipeline.", "tool": "inspect_columns", "args": { "table": "sales_pipeline" } } ```