{
    "action": "tool_call",
    "reasoning": "I need to check for logical inconsistencies in sales_pipeline, specifically whether the 2089 nulls in close_date and close_value align with deal_stage values (e.g., 'Won' deals should have close values, 'Engaging' deals might not). I'll also check if any close_dates precede engage_dates, which would be impossible.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT deal_stage, COUNT(*) as total_deals, COUNT(close_date) as has_close_date, COUNT(close_value) as has_close_value, COUNT(engage_date) as has_engage_date, SUM(CASE WHEN close_date < engage_date THEN 1 ELSE 0 END) as impossible_date_order FROM raw.sales_pipeline GROUP BY deal_stage ORDER BY deal_stage",
        "purpose": "Check logical consistency between deal_stage and presence of close_date/close_value, and detect impossible date ordering"
    }
}