{
    "action": "tool_call",
    "reasoning": "The only true timestamp is _ingestion_timestamp; check load batches by day for any spikes, dips, or gaps.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT date_trunc('day', _ingestion_timestamp) AS ingest_day, _batch_id, COUNT(*) AS rows_loaded, MIN(_ingestion_timestamp) AS first_ts, MAX(_ingestion_timestamp) AS last_ts FROM raw.bedtime_screentime_sleep_debt GROUP BY 1, 2 ORDER BY 1, 2",
        "purpose": "Check whether the only timestamp (ingestion) shows any spikes, dips, or breaks",
        "source": "raw"
    }
}