I need to identify categorical columns and count their distinct values. Let me start by getting an overview of the dataset's columns. ```json { "action": "tool_call", "reasoning": "I need to see the column metadata across all tables to identify which columns are categorical and then count distinct values for each. I'll start by inspecting the main tables to understand their structure.", "tool": "inspect_columns", "args": { "table": "raw.cleandata" } } ```