I think @zh99998 meant “the system” as in “the Meta Forum”. I think there’s an argument to be made here that when a category is visible to you but still limited in some ways, Discourse should explain what those limitations are.
Maybe when non-default permissions are applied, the UI should expose which permissions apply to you, both on the Categories page as well as the drop-down.
Maybe just enough to give people a clue:
plugin x81 -
create, reply, see
Plugin directory. To post here, message a Staff member and ask for access. One post per plugin please.
Anyhow, as a first measure I edited the category description a bit to make it clearer.