{
    "action": "tool_call",
    "reasoning": "The Days column contains non-numeric values ('def.', '–', 'draw vs.', etc.) instead of actual reign durations, which is highly unusual for a championship dataset. I need to understand what data is actually stored in the numeric-looking columns and whether reign durations can be computed from Begin_reign and End_reign dates.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT Champion, Recognition, Begin_reign, End_reign, Days, Title_defenses FROM raw.championsdataset WHERE Days NOT IN ('def.', '–', ' ', 'draw vs.', '−') AND Days NOT LIKE 'def.%' AND Days NOT LIKE 'draw%' LIMIT 20",
        "purpose": "Find rows where Days appears to contain actual numeric values to understand the data structure",
        "source": "raw"
    }
}