There already are some existing shortcuts for annotations. You can see an example workflow here:
https://forum.inaturalist.org/t/interpret-annotation-shortcut-as-upvote-when-it-duplicates-existing-annotation/24423
There are also some customizable, user-made extensions that can do more complex workflows, eg:
https://forum.inaturalist.org/t/announcing-the-universal-metadata-tool-beta/53182
that you could look into.