{
    "action": "tool_call",
    "reasoning": "My earlier draft cited an ingestion query, but no result is in my evidence. I need to run it so the claim about a single batch and timestamp is grounded before I answer that the data has no real time dimension.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT _batch_id, _source_file, _source_system, MIN(_ingestion_timestamp) AS first_ingested, MAX(_ingestion_timestamp) AS last_ingested, COUNT(*) AS n_rows, COUNT(DISTINCT Student_ID) AS n_students FROM raw.Social_media_impact_on_life GROUP BY _batch_id, _source_file, _source_system",
        "purpose": "Verify whether the only timestamp column reflects a single load event, and confirm one row per student",
        "source": "raw"
    }
}