{
    "action": "tool_call",
    "reasoning": "Retrying with a valid JSON action: show the 3 highest and 3 lowest specimens by PetalLengthCm with their species and other measurements.",
    "tool": "query_sql",
    "args": {
        "sql": "(SELECT 'highest' AS extreme, Id, Species, PetalLengthCm, PetalWidthCm, SepalLengthCm, SepalWidthCm FROM raw.Iris ORDER BY PetalLengthCm DESC, Id LIMIT 3) UNION ALL (SELECT 'lowest' AS extreme, Id, Species, PetalLengthCm, PetalWidthCm, SepalLengthCm, SepalWidthCm FROM raw.Iris ORDER BY PetalLengthCm ASC, Id LIMIT 3)",
        "purpose": "Show the top 3 and bottom 3 records by PetalLengthCm, the metric with highest eta-squared",
        "source": "raw"
    }
}