A tool for a medical instrument includes an effecting device, a transmission rod, of which the distal end is coupled to the effecting device, for transferring at least either a force or a torque to the effecting device, and a cutting device, which, to cut tissue, is movable in a channel in the transmission rod and in the effecting device. To cut tissue, the cutting device is movable in a channel in the transmission rod and in the effecting device.
