Chocolate reef stars are considered not reef safe. I have one and other stars that never bother anything. I would not worry placing a chocolate chip in a reef tank.
you can keep ht cc in the sump and cut one leg off at a time and feed the shrimp that. but most likely if you put the whole cc star in the shrimp will find it before it does any damage
i bought one CC star but like how often would harley need to eat? he only has so many legs. I currently have it in a separate biocube from my DT. trying to breed asterina