Minimally invasive, multi-functional robotic surgical tool devices for use as lavaging, material aspiration or delivery surgical forceps, scissors or clamp or other device, consisting of a monolithic work element and open central lumen with various functional tips. Such devices may in use follow a central lumen of another device or over a wire in a longitudinal direction upon introduction to a body. Flush and vacuum transport mechanisms, imaging mechanisms or energy source mechanisms may be incorporated. Inner and outer sheaths which may be co-axially disposed relative to a work element may be configured to actuate a beak or beaks and provisions for simultaneous beak closing under rotation may be incorporated.