{
    "action": "tool_call",
    "reasoning": "My previous draft cited numbers, but no tool results are in evidence. I need to ground them first, starting with the gold species summary, which holds the per-species averages, mins, maxes and medians.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT species, row_count, petal_length__avg, petal_length__min, petal_length__max, petal_length__median, petal_width__avg, petal_width__min, petal_width__max, sepal_length__avg, sepal_width__min, sepal_width__max FROM iris_by_species",
        "purpose": "Compare species ranges on each measure to see which feature separates species best",
        "source": "gold"
    }
}