{
    "action": "tool_call",
    "reasoning": "I have the row and column counts from step-1: ittf_rankings has 271,271 rows and 11 columns, ittf_rankings_women has 202,311 rows and 11 columns. The dataset card shows temporal axes YearNum (2001..2020) for both tables. To confirm the exact time period coverage in the actual data, I'll query the min and max YearNum from both tables in a single query.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT 'ittf_rankings' AS table_name, MIN(YearNum) AS min_year, MAX(YearNum) AS max_year FROM raw.ittf_rankings UNION ALL SELECT 'ittf_rankings_women', MIN(YearNum), MAX(YearNum) FROM raw.ittf_rankings_women",
        "purpose": "Get the actual time period coverage (min and max year) from both tables",
        "source": "raw"
    }
}