If you try to register your circulation manager with the metadata wrangler and there's an error because of a problem on your side, you'll get a problem detail document that looks like this:

{"status": 502, "type": "http://librarysimplified.org/terms/problem/remote-integration-failed", "detail": "Could not retrieve public key from http://my-circulation-manager/public_key", "title": "Could not retrieve document"}

When the error is displayed to the end-user, almost all of the useful information is omitted:

Displaying information from the problem detail document will make it more clear to the administrator what has gone wrong.