Lemmy

I honestly don't know enough about the Fediverse APIs, but assuming that they provide similar functionality to Reddit's:

I would say a bot account should be reserved for accounts that largely operate automatically with little human intervention necessary.

Just like on Reddit, I would still like to have a Disclaimer on the bottom of posts/comments of such accounts stating that the action was performed by a bot. Ideally with a way to feedback the dev and a link to a GitHub page.