Look into whether READ_ONLY but not RUNTIME_ONLY domain server ops should be visible to users

Ops registered on a domain server without the RUNTIME_ONLY flag are hidden from users (e.g. in read-operation-names results etc) in order to not delude users into thinking they can do something like :write-attribute directly on a server (instead of modifying host or domain config elements.)

But shouldn't a READ_ONLY flag be sufficient as well? An op that only reads config should be valid.