{
    "action": "tool_call",
    "reasoning": "I have no tool results in this turn to back the data-quality claims, so I will profile raw.iris in one query (nulls, ranges, distinct values, batches, sources, duplicate rows) before answering.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT COUNT(*) AS n, COUNT(sepal_length) AS sl_nn, COUNT(sepal_width) AS sw_nn, COUNT(petal_length) AS pl_nn, COUNT(petal_width) AS pw_nn, COUNT(species) AS sp_nn, COUNT(DISTINCT species) AS species_distinct, COUNT(DISTINCT _batch_id) AS batches, COUNT(DISTINCT _source_file) AS files, COUNT(DISTINCT _source_system) AS systems, MIN(sepal_length) AS sl_min, MAX(sepal_length) AS sl_max, MIN(sepal_width) AS sw_min, MAX(sepal_width) AS sw_max, MIN(petal_length) AS pl_min, MAX(petal_length) AS pl_max, MIN(petal_width) AS pw_min, MAX(petal_width) AS pw_max, (SELECT COUNT(*) FROM (SELECT sepal_length, sepal_width, petal_length, petal_width, species FROM raw.iris GROUP BY ALL HAVING COUNT(*) > 1)) AS duplicate_groups FROM raw.iris",
        "purpose": "Profile completeness, ranges, source diversity and duplicates for raw.iris",
        "source": "raw"
    }
}