{
    "action": "tool_call",
    "reasoning": "My earlier reply cited profile numbers, but no query result backs them in the evidence. I'll run one profiling query first to ground them.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT COUNT(*) AS total_rows, COUNT(DISTINCT stock_name) AS tickers, COUNT(DISTINCT company_name) AS companies, MIN(date) AS first_date, MAX(date) AS last_date, SUM(CASE WHEN date >= DATE '2022-11-30' THEN 1 ELSE 0 END) AS rows_after_chatgpt, AVG((high - low) / NULLIF(close, 0)) AS avg_range_pct, AVG(volume) AS avg_volume, MEDIAN(volume) AS median_volume, SUM(CASE WHEN volume = 0 THEN 1 ELSE 0 END) AS zero_volume_rows FROM raw.semi_conductor_se",
        "purpose": "Profile the dataset (size, tickers, date span, post-ChatGPT rows, volatility, volume skew, zero-volume rows) to ground the suggested questions",
        "source": "raw"
    }
}