{
    "action": "tool_call",
    "reasoning": "The evidence section shows no results, so I can't cite the surface numbers from my earlier draft. I'll query the gold surface aggregate so any figures I give come from a rendered result.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT * FROM raw_kaggle_by_Surface",
        "purpose": "Get per-surface aggregates of serve output (aces, double faults) and rank measures to ground the answer",
        "source": "gold"
    }
}