What This Does: Creates a temporary agent and a one-time preview link that expires in 5 minutes. Opening the returned URL launches a live video session using the specified avatar, so you can see exactly how it will look and behave before using it in production.
The avatar ID to preview (format: avat_<ULID> or a pre-built avatar ID such as PUBLIC/Avatars/sara-office). Returned by Upload Face Avatar or found via List Avatars.