{
    "action": "tool_call",
    "reasoning": "Show the highest and lowest Mental_Health_Index records, the central wellbeing outcome, with context columns. The DuckDB ORDER BY inside a CTE with LIMIT is valid.",
    "tool": "query_sql",
    "args": {
        "sql": "WITH hi AS (SELECT 'highest' AS record_type, Student_ID, Age, Gender, Academic_Level, Primary_Platform, Daily_Usage_Hours, Sleep_Duration_Hours, Perceived_Stress_Score, Academic_Performance_GPA, Overall_Impact, Mental_Health_Index FROM raw.Social_media_impact_on_life ORDER BY Mental_Health_Index DESC, Student_ID LIMIT 5), lo AS (SELECT 'lowest' AS record_type, Student_ID, Age, Gender, Academic_Level, Primary_Platform, Daily_Usage_Hours, Sleep_Duration_Hours, Perceived_Stress_Score, Academic_Performance_GPA, Overall_Impact, Mental_Health_Index FROM raw.Social_media_impact_on_life ORDER BY Mental_Health_Index ASC, Student_ID LIMIT 5) SELECT * FROM hi UNION ALL SELECT * FROM lo",
        "purpose": "Show highest and lowest records of Mental_Health_Index, the central wellbeing outcome",
        "source": "raw"
    }
}