{
    "action": "tool_call",
    "reasoning": "Dates are VARCHAR with mixed hyphen characters (non-breaking hyphen U+2011 and regular); normalize and parse them to get the true min/max per fact table.",
    "tool": "query_sql",
    "args": {
        "sql": "WITH d AS (SELECT 'raw_kaggle' AS tbl, try_strptime(replace(\"Date\", '‑', '-'), '%d-%b-%Y') AS dt FROM raw.raw_kaggle UNION ALL SELECT 'return_kaggle', try_strptime(replace(\"Date\", '‑', '-'), '%d-%b-%Y') FROM raw.return_kaggle UNION ALL SELECT 'serve_kaggle', try_strptime(replace(\"Date\", '‑', '-'), '%d-%b-%Y') FROM raw.serve_kaggle) SELECT tbl, CAST(MIN(dt) AS DATE) AS min_date, CAST(MAX(dt) AS DATE) AS max_date, COUNT(*) AS n_rows, COUNT(dt) AS parsed_rows FROM d GROUP BY tbl ORDER BY tbl",
        "purpose": "Compute true date range per fact table",
        "source": "raw"
    }
}