{
    "action": "tool_call",
    "reasoning": "Check Id uniqueness, exact duplicate measurement groups, and near-duplicate pairs in one query over raw.Iris.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT (SELECT COUNT(*) FROM raw.Iris) AS total_rows, (SELECT COUNT(DISTINCT Id) FROM raw.Iris) AS distinct_ids, (SELECT COUNT(*) FROM (SELECT 1 FROM raw.Iris GROUP BY SepalLengthCm, SepalWidthCm, PetalLengthCm, PetalWidthCm HAVING COUNT(*) > 1)) AS dup_measure_groups, (SELECT COUNT(*) FROM (SELECT 1 FROM raw.Iris GROUP BY SepalLengthCm, SepalWidthCm, PetalLengthCm, PetalWidthCm, Species HAVING COUNT(*) > 1)) AS dup_groups_with_species, (SELECT COUNT(*) FROM raw.Iris a JOIN raw.Iris b ON a.Id < b.Id AND abs(a.SepalLengthCm-b.SepalLengthCm) <= 0.1 AND abs(a.SepalWidthCm-b.SepalWidthCm) <= 0.1 AND abs(a.PetalLengthCm-b.PetalLengthCm) <= 0.1 AND abs(a.PetalWidthCm-b.PetalWidthCm) <= 0.1 AND NOT (a.SepalLengthCm=b.SepalLengthCm AND a.SepalWidthCm=b.SepalWidthCm AND a.PetalLengthCm=b.PetalLengthCm AND a.PetalWidthCm=b.PetalWidthCm)) AS near_dup_pairs_within_0_1cm",
        "purpose": "Check Id uniqueness, exact duplicate groups, and near-duplicate pairs (all four measures within 0.1 cm)",
        "source": "raw"
    }
}