{
    "action": "tool_call",
    "reasoning": "My previous reply cited numbers with no tool results behind them in this turn, and its column counts conflicted with the card. I'll re-ground the answer by pulling row and column counts from the metadata overview.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT table_name, row_count, column_count FROM analytics.table_overview ORDER BY row_count DESC",
        "purpose": "Verify per-table row and column counts",
        "source": "raw"
    }
}