{
  "call_id": "synthetic-support-example",
  "task_name": "Customer asks about refund eligibility",
  "duration_s": 12,
  "timeline": [
    { "t": 0, "type": "message", "speaker": "caller", "text": "Can I get a refund for an order delivered yesterday?" },
    { "t": 3, "type": "message", "speaker": "agent", "text": "I will check the refund policy before confirming eligibility." },
    { "t": 5, "type": "tool_call", "agent": "support", "tool": "get_refund_policy", "arguments": {}, "result": { "return_window_days": 14, "conditions": "Item must be unused." } },
    { "t": 12, "type": "message", "speaker": "agent", "text": "The policy allows returns within 14 days if the item is unused. Is your item unused?" }
  ]
}