{
    "action": "tool_call",
    "reasoning": "The evidence shows a striking pattern: deals under $1K have a 42.9% win rate, while ALL deals $1K+ have a 100% win rate. This is highly counterintuitive - normally larger deals are harder to close. I need to verify this isn't a data artifact by examining the relationship between deal value and deal stage more carefully, particularly checking if the $1K+ deals might all be in 'Won' stage by definition (i.e., close_value is only populated for won deals).",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT deal_stage, COUNT(*) as deals, COUNT(close_value) as has_value, SUM(CASE WHEN close_value >= 1000 THEN 1 ELSE 0 END) as deals_1k_plus, SUM(CASE WHEN close_value < 1000 AND close_value > 0 THEN 1 ELSE 0 END) as deals_under_1k FROM raw.b2b_sales_funnel_pipeline GROUP BY deal_stage ORDER BY deal_stage",
        "purpose": "Verify whether close_value is only populated for Won deals, which would explain the 100% win rate for deals $1K+",
        "source": "raw"
    }
}