{
    "action": "tool_call",
    "reasoning": "I will check the raw table for any null values across the measurement columns, as well as identify if there are any duplicate rows (excluding the Id column) which is a common data quality issue.",
    "tool": "query_sql",
    "args": {
        "purpose": "Check for nulls and duplicates in the raw Iris table",
        "source": "raw",
        "sql": "SELECT \n  COUNT(*) - COUNT(SepalLengthCm) as null_sepal_len,\n  COUNT(*) - COUNT(SepalWidthCm) as null_sepal_wid,\n  COUNT(*) - COUNT(PetalLengthCm) as null_petal_len,\n  COUNT(*) - COUNT(PetalWidthCm) as null_petal_wid,\n  (SELECT COUNT(*) FROM (SELECT SepalLengthCm, SepalWidthCm, PetalLengthCm, PetalWidthCm, Species FROM raw.Iris GROUP BY SepalLengthCm, SepalWidthCm, PetalLengthCm, PetalWidthCm, Species HAVING COUNT(*) > 1)) as duplicate_rows\nFROM raw.Iris"
    }
}