A robot according to the invention comprises a tool, in particular a surgical instrument, said tool comprising a shaft having a distal joint assembly with at least one degree of freedom. The robot also comprises a protective cover that can be displaced from a distal position into a proximal position on the shaft. In the distal position, said protective cover accommodates the joint assembly, and when the protective cover is in the proximal position the joint assembly projects distally out of the protective cover.
