<invoke name="x"> </invoke> Wait, I must output JSON only. {"action": "tool_call", "reasoning": "Profile numeric columns in one query for ranges, nulls, impossible values, and key uniqueness.", "tool": "query_sql", "args": {"sql": "SELECT COUNT(*) AS n, COUNT(DISTINCT Student_ID) AS distinct_ids, COUNT(Student_ID) AS id_nn, MIN(Age) AS age_min, MAX(Age) AS age_max, COUNT(Age) AS age_nn, MIN(Daily_Usage_Hours) AS du_min, MAX(Daily_Usage_Hours) AS du_max, AVG(Daily_Usage_Hours) AS du_avg, STDDEV(Daily_Usage_Hours) AS du_sd, COUNT(Daily_Usage_Hours) AS du_nn, MIN(Weekend_Extra_Hours) AS we_min, MAX(Weekend_Extra_Hours) AS we_max, COUNT(Weekend_Extra_Hours) AS we_nn, MIN(Sleep_Duration_Hours) AS sl_min, MAX(Sleep_Duration_Hours) AS sl_max, AVG(Sleep_Duration_Hours) AS sl_avg, STDDEV(Sleep_Duration_Hours) AS sl_sd, COUNT(Sleep_Duration_Hours) AS sl_nn, MIN(Sleep_Quality_Score) AS sq_min, MAX(Sleep_Quality_Score) AS sq_max, COUNT(Sleep_Quality_Score) AS sq_nn, MIN(Perceived_Stress_Score) AS ps_min, MAX(Perceived_Stress_Score) AS ps_max, COUNT(Perceived_Stress_Score) AS ps_nn, MIN(Mental_Health_Index) AS mh_min, MAX(Mental_Health_Index) AS mh_max, COUNT(Mental_Health_Index) AS mh_nn, MIN(Academic_Performance_GPA) AS gpa_min, MAX(Academic_Performance_GPA) AS gpa_max, COUNT(Academic_Performance_GPA) AS gpa_nn, SUM(CASE WHEN Daily_Usage_Hours + Sleep_Duration_Hours > 24 THEN 1 ELSE 0 END) AS over24, COUNT(Gender) AS g_nn, COUNT(Academic_Level) AS al_nn, COUNT(Primary_Platform) AS pp_nn FROM raw.Social_media_impact_on_life", "purpose": "Profile numeric columns, nulls, ranges, key uniqueness and impossible values", "source": "raw"}}