Yeah this is an area we want to make a lot better. What we're currently thinking is giving the model a way to more explicitly call out that it is adding a call to something that needs an API key, which would add something to the UI to allow you to just paste in your key.

I think there's also work when need to do in the system prompt to guide the model away from all of the placeholder data (or at least so that when it adds it there's a better affordance to transform it to real data).