{
    "action": "tool_call",
    "reasoning": "I've confirmed beer_ratings has no exact duplicates (same user_id, beer_id, created_at). Now I need to check the other major tables for duplicates. I'll start with the next largest tables: beers, place_ratings, and users. I'll check for duplicates based on their natural keys.",
    "tool": "query_sql",
    "purpose": "Check for duplicate rows in beers, place_ratings, and users tables based on their primary identifiers",
    "args": {
        "sql": "WITH beers_dupes AS (SELECT beer_id, COUNT(*) as cnt FROM raw.beers GROUP BY beer_id HAVING COUNT(*) > 1), place_ratings_dupes AS (SELECT rating_id, COUNT(*) as cnt FROM raw.place_ratings GROUP BY rating_id HAVING COUNT(*) > 1), users_dupes AS (SELECT user_id, COUNT(*) as cnt FROM raw.users GROUP BY user_id HAVING COUNT(*) > 1) SELECT 'beers' as table_name, COUNT(*) as duplicate_groups, SUM(cnt) as total_duplicate_rows FROM beers_dupes UNION ALL SELECT 'place_ratings', COUNT(*), SUM(cnt) FROM place_ratings_dupes UNION ALL SELECT 'users', COUNT(*), SUM(cnt) FROM users_dupes",
        "purpose": "Check for duplicate primary keys in beers, place_ratings, and users tables"
    }
}