I need to identify the main categorical columns in this dataset and find their most common values with frequencies. Let me start by inspecting the columns to understand their types and characteristics. ```json { "action": "tool_call", "reasoning": "I need to see the column metadata to identify which columns are categorical (text/varchar types with reasonable cardinality). The inspect_columns tool will show me types, distinct counts, and semantic roles for all columns in the main table.", "tool": "inspect_columns", "args": { "table": "ai_supercomputers" } } ```