{
    "action": "tool_call",
    "reasoning": "The overview and initial stage breakdown show a typical funnel, but I notice something odd: 'Lost' deals have 0.0 average value and 0 total value, while 'Engaging' and 'Prospecting' stages have NULL values. This seems counterintuitive - why would lost deals have zero value when they presumably had a close_value at some point? I need to investigate the close_value distribution across deal stages to understand if this is a data artifact or reveals something surprising about how the business tracks opportunities.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT deal_stage, COUNT(*) as deal_count, COUNT(close_value) as deals_with_value, COUNT(*) - COUNT(close_value) as deals_without_value, MIN(close_value) as min_value, MAX(close_value) as max_value, AVG(close_value) as avg_value FROM raw.b2b_sales_funnel_pipeline GROUP BY deal_stage ORDER BY deal_count DESC",
        "purpose": "Examine close_value presence and distribution across deal stages to understand the zero/null pattern",
        "source": "raw"
    }
}