{
    "action": "tool_call",
    "reasoning": "Query the gold table Iris_by_Species for per-species feature statistics, which directly answers which features separate the species.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT * FROM Iris_by_Species",
        "purpose": "Get per-species feature stats (avg/min/max/median) to assess which features separate the species",
        "source": "gold"
    }
}