You should be fine, I have never had any issues with them picking on corals. They might irratate them such as a clown goby would, by perching on a coral.
I wish we could no with out a doubt if a fish would be reef safe lol. I have a reef safe purple tang that decided that it likes to eat open brains, he won't touch anything but them and he didn't mess with anything for 5 years go figure.