{
    "action": "tool_call",
    "reasoning": "My previous reply cited catalog numbers with no tool result behind it in this turn. I'll query the catalog metadata to check which columns are tagged categorical and what their distinct counts are.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT table_name, column_name, phys_type, semantic_role, rough_kind, distinct_count, approx_distinct_count FROM analytics.column_overview WHERE rough_kind = 'categorical' ORDER BY table_name, column_name",
        "purpose": "List columns the profiler tagged categorical with their distinct counts",
        "source": "raw"
    }
}