{
    "action": "tool_call",
    "reasoning": "Compute correlations of Mental_Health_Index with the other measures in one query to see which drivers matter most.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT ROUND(CORR(Mental_Health_Index, Daily_Usage_Hours),3) AS corr_daily_usage, ROUND(CORR(Mental_Health_Index, Sleep_Duration_Hours),3) AS corr_sleep_hours, ROUND(CORR(Mental_Health_Index, Sleep_Quality_Score),3) AS corr_sleep_quality, ROUND(CORR(Mental_Health_Index, Perceived_Stress_Score),3) AS corr_stress, ROUND(CORR(Mental_Health_Index, Academic_Performance_GPA),3) AS corr_gpa, MIN(Mental_Health_Index) AS min_mhi, MAX(Mental_Health_Index) AS max_mhi, ROUND(AVG(Mental_Health_Index),1) AS avg_mhi FROM raw.Social_media_impact_on_life",
        "purpose": "Justify Mental_Health_Index as the central metric via correlations with other measures",
        "source": "raw"
    }
}