{
    "action": "tool_call",
    "reasoning": "The gold table iris_by_species already holds per-species aggregates of all four measures, so query it directly to compare species feature profiles.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT * FROM iris_by_species",
        "purpose": "Compare species-level feature profiles to see which features separate the species",
        "source": "gold"
    }
}