Based on my following post `semi_random_guess_if_symbols_should_leak_everywhere` grin
Hmmm, maybe just simply `globally_visible`?
[Edit: oops, wrong way round, maybe `local_visibility`]
Actually if we want that to work for all languages, we could make it technical: `trust_file_scope` (which is really what this flags is about: whether we want to trust uctags' `isFileScope`)