{
    "action": "tool_call",
    "reasoning": "I've confirmed no exact duplicates in the two largest tables (columns_catalog and job_logs). Now I need to check llm_calls (49,360 rows, the third-largest table). The previous query failed because I assumed an 'id' column exists. Let me inspect llm_calls to see its actual columns and identify appropriate keys for duplicate detection.",
    "tool": "inspect_columns",
    "args": {
        "table": "llm_calls"
    }
}