One issue i saw related to scopes is the offline_access one that causes frequent reauthenticate request from the client. for example codex has this bug (https://github.com/openai/codex/issues/20503). many servers solve this with some workarounds or increasing the token life. In v2 of mcp-use coming end of the month there should be a builtin way to deal with buggy clients so the server remains connected.