{
    "action": "tool_call",
    "reasoning": "No query results are in evidence yet, so the numbers in my earlier draft are unbacked. I'll compute the per-platform summary of Mental_Health_Index and related measures from raw data before answering.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT Primary_Platform, COUNT(*) AS students, ROUND(AVG(Mental_Health_Index),2) AS avg_mental_health, ROUND(AVG(Daily_Usage_Hours),2) AS avg_daily_hours, ROUND(AVG(Perceived_Stress_Score),2) AS avg_stress, ROUND(AVG(Sleep_Duration_Hours),2) AS avg_sleep, ROUND(AVG(Academic_Performance_GPA),2) AS avg_gpa FROM raw.Social_media_impact_on_life GROUP BY Primary_Platform ORDER BY avg_mental_health DESC",
        "purpose": "Compare Mental_Health_Index and related measures across Primary_Platform groups",
        "source": "raw"
    }
}