{
    "action": "tool_call",
    "reasoning": "Start with the gold table iris_by_species, which already holds per-species aggregates for all four measures. This gives the basis for judging which features best separate the species.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT * FROM iris_by_species",
        "purpose": "Per-species aggregates of all four measurements to compare separation between species",
        "source": "gold"
    }
}