{
    "action": "tool_call",
    "reasoning": "I've found several patterns in the evidence: Won deals have 100% value assignment, Lost deals have 0 value, and there's a stark difference in win rates between deals under $1K (42.9%) vs $1K+ (100%). This last pattern is extremely counterintuitive - it suggests that EVERY single deal valued at $1K or above was won, with zero losses in that segment. This is the most surprising finding, but I need to verify it's not a data artifact by checking if Lost deals might have had values that were zeroed out, or if this represents a fundamental business rule (e.g., values only assigned upon winning).",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT deal_stage, COUNT(*) as total_deals, COUNT(CASE WHEN close_value > 0 THEN 1 END) as deals_with_positive_value, COUNT(CASE WHEN close_value = 0 THEN 1 END) as deals_with_zero_value, COUNT(CASE WHEN close_value IS NULL THEN 1 END) as deals_with_null_value FROM raw.b2b_sales_funnel_pipeline GROUP BY deal_stage ORDER BY deal_stage",
        "purpose": "Verify whether Lost deals have zero values or null values, and confirm the value assignment pattern across all deal stages",
        "source": "raw"
    }
}