{
    "action": "tool_call",
    "reasoning": "Find rows that repeat on all measurement columns and species (ignoring Id and ingestion metadata), which is the meaningful duplicate check. Grouping shows the repeated groups and their sizes.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT SepalLengthCm, SepalWidthCm, PetalLengthCm, PetalWidthCm, Species, COUNT(*) AS n, MIN(Id) AS first_id, MAX(Id) AS last_id FROM raw.Iris GROUP BY SepalLengthCm, SepalWidthCm, PetalLengthCm, PetalWidthCm, Species HAVING COUNT(*) > 1 ORDER BY n DESC, first_id",
        "purpose": "Detect exact duplicate measurements+species, ignoring Id",
        "source": "raw"
    }
}