{
    "action": "tool_call",
    "reasoning": "I need to count distinct values for all categorical columns. From the inspect_columns result, I can see 30 of 61 columns with their types and distinct counts already shown. However, I need to get the complete picture of all 61 columns to answer comprehensively. Let me first get the remaining columns, then I'll write a single SQL query to compute COUNT(DISTINCT ...) for all categorical (VARCHAR/BOOLEAN) columns in one pass.",
    "tool": "inspect_columns",
    "args": {
        "table": "ai_supercomputers"
    }
}