{
    "action": "tool_call",
    "reasoning": "I've reviewed the evidence and found several interesting patterns. The most striking is South Korea's medal composition - 66.7% bronze with only 14.3% gold, despite being the 2nd highest medal winner. However, I want to verify one more counterintuitive angle: whether China's dominance actually DECREASED in the most recent era (2020+) when they won 43.3% of medals vs 54-56% in earlier eras, yet their gold percentage remained sky-high at 90%. Let me check if this represents increased competition or just fewer total medals available.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT year, COUNT(*) as total_medals_available, SUM(CASE WHEN country = 'China' THEN 1 ELSE 0 END) as china_medals, ROUND(100.0 * SUM(CASE WHEN country = 'China' THEN 1 ELSE 0 END) / COUNT(*), 1) as china_pct, COUNT(DISTINCT country) as countries_medaling FROM raw.olympic_table_tennis_medals_1988_2024 WHERE year >= 2020 GROUP BY year ORDER BY year",
        "purpose": "Check if China's lower medal percentage in 2020+ is due to increased competition or format changes",
        "source": "raw"
    }
}