Probably any tool will work — the issue will be adjusting feeds and speeds so that you’re still forming a chip (which will carry away heat) and the specific alloy in question — pure copper is “gummy” and hard to machine and sticks to tooling.
A coated tool should help.
@wmoy has a video series on this sort of thing:
https://www.youtube.com/hashtag/materialmonday
which I tried to gather at:
and there is a video on thin sheets incl. copper and brass:
