{
    "action": "tool_call",
    "reasoning": "The inspect_columns result shows all columns are VARCHAR (text), which means numeric correlations require casting. The column names suggest several numeric measures (Total Calls, AI Handled, Human Handled, Voicemail, AI Resolution %, Human %) plus unnamed columns that appear to contain metrics based on their distinct counts. I need to first examine sample rows to understand what data these columns actually contain, especially the unnamed columns, before computing correlations.",
    "tool": "query_sql",
    "source": "raw",
    "purpose": "Sample rows to understand the actual data structure and identify which columns contain numeric values for correlation analysis",
    "sql": "SELECT Day, \"Total Calls\", \"AI Handled\", \"Human Handled\", Voicemail, \"AI Resolution %\", \"Human %\", _unnamed_7, _unnamed_8, _unnamed_9 FROM raw.callyeah_analytics_2026_07_23 LIMIT 10"
}