{
    "action": "tool_call",
    "reasoning": "The question asks for distinct value counts for categorical columns. From the evidence, I can see that inspect_columns already returned the distinct counts for all columns in the Iris table. The categorical column is Species with ~3 distinct values. However, the '~' indicates these are approximate counts. To provide exact counts for categorical columns, I should query the actual distinct counts using SQL. The categorical column is Species (VARCHAR, role=dimension). I'll write a single query to get the exact distinct count.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT COUNT(DISTINCT Species) as distinct_species_count FROM raw.Iris",
        "purpose": "Get exact distinct count for the categorical Species column",
        "source": "raw"
    }
}