{
    "action": "tool_call",
    "reasoning": "I've found several data quality issues already: 1) An orphaned product 'GTXPro' in pipeline but not in products table, 2) An orphaned account (empty string '') in pipeline but not in accounts table, 3) All 'Lost' deals have close_value=0 which may be a data entry convention rather than actual zero value, 4) Close values align well with sales prices for Won deals. Now I need to check for additional issues: duplicate opportunity_ids, text formatting inconsistencies (case, whitespace), and whether the empty string account has any other characteristics that might explain it.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT COUNT(*) as total_opps, COUNT(DISTINCT opportunity_id) as distinct_opps, COUNT(*) - COUNT(DISTINCT opportunity_id) as duplicates FROM raw.b2b_sales_funnel_pipeline",
        "purpose": "Check for duplicate opportunity_ids in the pipeline"
    }
}