{
    "action": "tool_call",
    "reasoning": "The previous prose answer cannot be cited because no tool results are visible to me. I'll re-ground it with one query that profiles the categorical columns and the per-company row counts.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT COUNT(*) AS total_rows, COUNT(DISTINCT company_name) AS distinct_companies, COUNT(DISTINCT stock_name) AS distinct_tickers, COUNT(DISTINCT _source_system) AS distinct_source_systems, COUNT(DISTINCT _source_file) AS distinct_source_files, COUNT(DISTINCT _batch_id) AS distinct_batches, MIN(date) AS first_date, MAX(date) AS last_date FROM raw.semi_conductor_se",
        "purpose": "Profile categorical columns: distinct counts for company, ticker and ingestion metadata, plus date range",
        "source": "raw"
    }
}