{
    "action": "tool_call",
    "reasoning": "My earlier draft cited numbers that I have no tool results for in the evidence. I'll pull the per-species aggregates from the gold table to ground the petal_length claims.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT species, row_count, petal_length__min, petal_length__max, petal_length__avg, petal_length__median, petal_width__min, petal_width__max, petal_width__avg, sepal_length__min, sepal_length__max, sepal_length__avg, sepal_width__min, sepal_width__max, sepal_width__avg FROM iris_by_species ORDER BY petal_length__avg",
        "purpose": "Per-species ranges and averages of all four measures to judge which best separates species",
        "source": "gold"
    }
}