{
    "action": "tool_call",
    "reasoning": "No evidence is visible in this turn, so I'll re-ground the column counts before answering. The card says 78 columns and my earlier draft cited a different figure from the catalog overview. I'll query the overview metadata to check.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT table_name, row_count, column_count FROM analytics.table_overview ORDER BY table_name",
        "purpose": "Verify row and column counts per table from the catalog overview",
        "source": "raw"
    }
}