{
    "action": "tool_call",
    "reasoning": "No evidence has been gathered in this turn, and the earlier draft made claims no query backed. I'll start with a single profiling query over raw.Iris to ground the data-quality answer: nulls, ranges, distinct counts and duplicates.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT COUNT(*) AS n, COUNT(DISTINCT Id) AS distinct_ids, COUNT(SepalLengthCm) AS sl_nonnull, COUNT(SepalWidthCm) AS sw_nonnull, COUNT(PetalLengthCm) AS pl_nonnull, COUNT(PetalWidthCm) AS pw_nonnull, COUNT(Species) AS sp_nonnull, COUNT(DISTINCT Species) AS distinct_species, MIN(SepalLengthCm) AS sl_min, MAX(SepalLengthCm) AS sl_max, MIN(SepalWidthCm) AS sw_min, MAX(SepalWidthCm) AS sw_max, MIN(PetalLengthCm) AS pl_min, MAX(PetalLengthCm) AS pl_max, MIN(PetalWidthCm) AS pw_min, MAX(PetalWidthCm) AS pw_max, COUNT(DISTINCT _source_file) AS files, COUNT(DISTINCT _batch_id) AS batches, COUNT(DISTINCT _source_system) AS systems FROM raw.Iris",
        "purpose": "Profile nulls, ranges, distinct counts and provenance in one query",
        "source": "raw"
    }
}