{
    "action": "tool_call",
    "reasoning": "I need to check the remaining high-volume tables (llm_calls, column_tags, tag_lineage_edges) for exact duplicates. I'll write a simpler query that checks each table separately for duplicate primary keys.",
    "tool": "query_sql",
    "purpose": "Check for exact duplicate rows in llm_calls, column_tags, and tag_lineage_edges tables",
    "sql": "SELECT 'llm_calls' AS table_name, COUNT(*) - COUNT(DISTINCT call_id) AS duplicate_count FROM raw.llm_calls UNION ALL SELECT 'column_tags', COUNT(*) - COUNT(DISTINCT id) FROM raw.column_tags UNION ALL SELECT 'tag_lineage_edges', COUNT(*) - COUNT(DISTINCT id) FROM raw.tag_lineage_edges"
}