'Disclosure' is something journalists use to point out a potential external conflict/relationship the reader might unaware of. But you don't need it to point out authorship either. You're really saying 'I want you to be aware I wrote the thing we are discussing' not 'Please don't think I'm sockpuppetting for myself'.

This is a bit like an even more persnickety version 'nation state' in that the trivial fix is just dropping the pointless ceremony.