{
    "action": "tool_call",
    "reasoning": "I will query a few rows from the dataset to accurately describe the contents and meaning of each column, especially categorical ones like 'era', 'medal_value', and 'event_type'.",
    "tool": "query_sql",
    "args": {
        "purpose": "Sample rows to understand column meanings",
        "source": "raw",
        "sql": "SELECT * FROM raw.olympic_table_tennis_medals_1988_2024 LIMIT 5;"
    }
}