{
    "action": "tool_call",
    "reasoning": "Show mixed currency/price-scale evidence: group by ticker suffix (exchange) with price medians, counts, and zero-volume rows.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT CASE WHEN stock_name LIKE '%.%' THEN split_part(stock_name, '.', 2) ELSE '(none/US)' END AS suffix, COUNT(DISTINCT stock_name) AS tickers, COUNT(*) AS n, MEDIAN(close) AS med_close, MAX(close) AS max_close, MIN(close) AS min_close, SUM(CASE WHEN volume = 0 THEN 1 ELSE 0 END) AS zero_vol_rows FROM raw.semi_conductor_se GROUP BY 1 ORDER BY med_close DESC",
        "purpose": "Reveal mixed currencies/price scales and zero-volume rows by exchange suffix",
        "source": "raw"
    }
}