{
    "action": "tool_call",
    "reasoning": "No query results are in evidence yet, so the numbers in my earlier draft are not backed by a tool result. I'll pull the per-species aggregates from the gold table first.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT * FROM iris_by_species",
        "purpose": "Per-species counts and min/avg/median/max of each measurement to judge which features separate the groups",
        "source": "gold"
    }
}