{
    "action": "tool_call",
    "reasoning": "I can't see tool results in the evidence for this turn, so I'll re-ground the claims by querying the gold table for species-level stats before answering.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT * FROM iris_by_species",
        "purpose": "Species-level averages, min, max and medians for all four measures, to judge which measure best separates species",
        "source": "gold"
    }
}