{
    "action": "tool_call",
    "reasoning": "My previous draft cited surface numbers without any tool result behind them, so I need to ground them. The gold table raw_kaggle_by_Surface should hold the surface breakdown, and I don't know its columns yet, so I'll look at it first.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT * FROM raw_kaggle_by_Surface",
        "purpose": "Get the surface-level summary to ground the claims about grouping by surface",
        "source": "gold"
    }
}