{
    "action": "tool_call",
    "reasoning": "The previous query failed because the 'Days' column contains non-numeric values like 'def.' and '−'. I need to examine the actual data more carefully to understand the data quality issues. Let me query to see what distinct values exist in the Days column and how many rows have clean numeric data vs. problematic values.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT Days, COUNT(*) as count FROM raw.championsdataset GROUP BY Days ORDER BY count DESC LIMIT 20",
        "purpose": "Examine the Days column to understand data quality and identify which values are numeric vs. non-numeric"
    }
}