I think it is important to clearly communicate the nature of the action to everyone. The reason is that, although it is a very useful tool, the AI spam detector is prone to false positives.
There is a significant difference between the implications of an automated system silencing a user as compared to a human moderator doing the same. If people assume the silencing was performed by the human moderator, then that unfairly attaches a stigma to that new user in the case of a false positive.