{
    "action": "tool_call",
    "reasoning": "The overview mentions job_logs, llm_calls, and batches as operational/telemetry tables that likely contain timestamps. I need to identify which tables have temporal columns and examine their distributions to determine the overall trend. I'll start by inspecting the columns of the largest operational tables to find date/timestamp fields.",
    "tool": "inspect_columns",
    "args": {
        "table": "job_logs"
    }
}