{
    "action": "tool_call",
    "reasoning": "Confirm row count, date coverage, and number of stocks/companies as an orientation step.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT COUNT(*) AS row_count, MIN(date) AS first_date, MAX(date) AS last_date, COUNT(DISTINCT date) AS trading_days, COUNT(DISTINCT stock_name) AS stocks, COUNT(DISTINCT company_name) AS companies FROM raw.semi_conductor_se",
        "purpose": "Confirm row count and date coverage",
        "source": "raw"
    }
}