{
    "action": "tool_call",
    "reasoning": "No query results are visible to me in this turn, so I can't cite the earlier samples. I'll re-run a sample that leaves out the person-identifying bedtime_phone_minutes and the ingestion metadata columns.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT user_id, age, gender, occupation_type, chronotype, primary_bedtime_app, screen_brightness_pct, blue_light_filter_active, caffeine_post_5pm_mg, physical_activity_min, sleep_latency_min, total_sleep_hours, deep_sleep_pct, rem_sleep_pct, morning_alarm_snoozes, next_day_fatigue_score, sleep_debt_category FROM raw.bedtime_screentime_sleep_debt USING SAMPLE 15 ROWS",
        "purpose": "Random sample of 15 rows without person-identifying or ingestion columns",
        "source": "raw"
    }
}