I think it's a judgment call. Sort of like the way "derivative works" work vis-a-vis copyright law. If a work is "substantially transformative" or whatever the phrase is, then it's considered an original work. I'd say that if a work "substantially AI" then that should be probably be disclosed. But if you use AI but the work is still "substantially human written" overall then maybe it's less of an issue. And clearly there's a continuum here. I mean, if you use AI to fix a single misspelled word in a 5000 word essay, is there really any point in putting a disclosure statement? C'mon.

So for me, I'd just "play it by ear". Now as it happens, I basically don't use AI for written works (blog posts, essays, etc.) so it's kind of a non issue. The only time I do anything like that, I might embed a quote from an AI or a screenshot of a conversation with AI and comment on it. In those cases, the use of AI is very explicit though.