Command `vc-annotate' runs `help-mode-hook'?

[Okam]

Hello,

I was trying to add a function to `help-mode-hook' to automatically 
rename the "*Help*" buffer. I found that the command that `vc-annotate' 
was running this hook, and so breaking when the buffer was renamed 
before the command completed.

Why does `vc-annotate' run `help-mode-hook', and is there a good way of 
detecting this and similar cases?

Thank you,
Okam