I need to identify categorical columns and count their distinct values. Let me start by inspecting the columns in both tables to understand their types and characteristics. ```json { "action": "tool_call", "reasoning": "I need to see the columns in raw.adsl first to identify which are categorical and get their distinct counts. The inspect_columns tool provides approximate distinct counts for all columns.", "tool": "inspect_columns", "args": { "table": "adsl" } } ```