We'll see more of this sort of thing as AI agents become more popular and capable. They will do things that the site or app should be able to do (or rather, things that
users want to be able to do) but don't offer. The YouTube music playlist is a good example. One thing I'd like to be able to do is make a playlist of some specific artists. But you can't. You have to select specific songs.
If sites want to avoid people using agents, they should offer the functionality that people are using the agents to accomplish.