"noted" means I have taken note/notice of that. Nothing impolite about it, unless your boss is one of those people who like a paragraph of prose every response.
as a reply to my manager's email for his request
or information.
two cases: the same answers may mean slightly different things for each case
Information?
Noted - thanks
Understood
Will action
Thanking you for the information.
Many thanks for your contribution.
Request?
Will action
Will do
Will get right onto that/it.
Will give that priority
I'll see that gets done
Understood
Will start ignoring that immediately :)