<invoke name="tool_call"> <parameter name="reasoning">Petal length separates species best per gold table; fetch the highest and lowest records from raw.</parameter> <parameter name="tool">query_sql</parameter> <parameter name="args">{"sql": "(SELECT 'highest' AS extreme, species, petal_length, petal_width, sepal_length, sepal_width FROM raw.iris ORDER BY petal_length DESC, petal_width DESC LIMIT 5) UNION ALL (SELECT 'lowest' AS extreme, species, petal_length, petal_width, sepal_length, sepal_width FROM raw.iris ORDER BY petal_length ASC, petal_width ASC LIMIT 5)", "purpose": "Top 5 and bottom 5 specimens by petal_length", "source": "raw"}</parameter> </invoke>