{
    "action": "tool_call",
    "reasoning": "I've already confirmed no exact duplicates exist in the two largest tables (columns_catalog and job_logs) by checking their natural keys. Now I need to check the third-largest table (llm_calls, 49,360 rows) and a few other significant tables. I'll start by inspecting llm_calls to understand its structure and identify appropriate columns for duplicate detection.",
    "tool": "inspect_columns",
    "args": {
        "table": "llm_calls"
    }
}