{
    "action": "tool_call",
    "reasoning": "Check whether AI_Purpose is a clean segmentation axis with distinct outcomes. Productivity_Score is DOUBLE and Accuracy_Rating and Satisfaction_Score are BIGINT, so they can be averaged directly.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT AI_Purpose, COUNT(*) AS n, ROUND(AVG(Productivity_Score),2) AS avg_productivity, ROUND(AVG(Satisfaction_Score),2) AS avg_satisfaction, ROUND(AVG(Accuracy_Rating),2) AS avg_accuracy FROM raw.AI_Usage_and_Impact_on_Students_and_Professionals GROUP BY AI_Purpose ORDER BY n DESC",
        "purpose": "Check whether AI_Purpose is a clean segmentation axis with distinct outcomes",
        "source": "raw"
    }
}