A registration and identification tool (1) for an instrument (100), comprising a body (2), a marker member (3) which is optically detectable and provided on the body (2), and a recess (4) in the body (2) which extends from an outer surface of the body (2) into the inside of the body (2), thereby defining an extension direction of the recess (4), wherein the recess (4) has a shape such that a lateral extension of the recess (4) decreases in the direction from the outer surface of the body (2) towards the inside of the body (2). A method for registration and identification of an instrument (100) comprising by placing a surgical tool (102) of the surgical instrument (100) into the recess (4) of the tool (1), pivoting the surgical instrument (100) relative to the marker member (3) while the surgical tool (102) is placed inside the recess (4), performing a detecting process of the relative movement of the surgical instrument (100), and identifying geometrical characteristics of the surgical tool (102) and/or registering the relative position of the surgical tool (102) to the remainder of the surgical instrument (100) using the results of the detecting process.