{
    "action": "tool_call",
    "reasoning": "No tool results are in evidence, so the numbers in my earlier draft are unverified. I'll query the gold table iris_by_species for the per-species stats before answering.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT * FROM iris_by_species",
        "purpose": "Per-species min/max/avg/median of all four measures to judge which feature separates species best",
        "source": "gold"
    }
}