{
    "action": "tool_call",
    "reasoning": "I need grounded numbers for the city and vertical ranking before answering. I'll run one query on deal count, disclosed-amount count and median ticket for the top cities, cleaning the VARCHAR amount with TRY_CAST.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT TRIM(\"City  Location\") AS city, COUNT(*) AS deals, COUNT(TRY_CAST(REPLACE(\"Amount in USD\", ',', '') AS DOUBLE)) AS deals_with_amount, MEDIAN(TRY_CAST(REPLACE(\"Amount in USD\", ',', '') AS DOUBLE)) AS median_usd, SUM(TRY_CAST(REPLACE(\"Amount in USD\", ',', '') AS DOUBLE)) AS total_usd FROM raw.startup_funding WHERE \"City  Location\" IS NOT NULL GROUP BY 1 ORDER BY deals DESC LIMIT 15",
        "purpose": "Rank cities by deal volume with median and total disclosed ticket size",
        "source": "raw"
    }
}