A tool (20, 70) for deploying an anchor sleeve (10, 17) onto at least one implantable medical device, the tool comprising: a holding element (210, 710) comprising an outer surface (212, 712) and an inner surface, the outer surface being configured to receive an anchor sleeve (10, 17) mounted thereon, and the inner surface defining a conduit (216, 716) of the holding element, the conduit configured to receive, in sliding engagement, at least one elongate body (101, 102, 103) of the at least one implantable medical device; a deployment tip (22, 72) comprising at least one opening (225, 725) configured to receive the holding element extending therethrough in sliding engagement; and a base member comprising a channel and a sidewall (201, 202, 203), within which the channel extends, the sidewall including a distal segment configured for attachment of the deployment tip thereto; wherein, when the deployment tip is attached to the distal segment of the base member, and the holding element extends through the opening of the deployment tip, the channel of the base member receives the holding element in sliding engagement therewith, so that the conduit of the holding element is in communication with the channel, and the holding element and the base member slide relative to one another between a first position and a second position, the first position at which the holding element extends distally from the attached deployment tip, and over a length sufficient to receive the mounting of the anchor sleeve on the outer surface thereof, and the second position at which the length of the holding element is recessed proximally from the at least one opening of the attached deployment tip; and the deployment tip is configured to engage an end of the anchor sleeve, when the anchor sleeve is mounted on the holding element, the deployment tip is attached to the base member, and the holding element extends through the at least one opening of the deployment tip, the engagement with the end of the anchor sleeve for pushing the mounted anchor sleeve distally along the outer surface of the holding element as the holding element and base member slide from the first position to the second position. a holding element (210, 710) comprising an outer surface (212, 712) and an inner surface, the outer surface being configured to receive an anchor sleeve (10, 17) mounted thereon, and the inner surface defining a conduit (216, 716) of the holding element, the conduit configured to receive, in sliding engagement, at least one elongate body (101, 102, 103) of the at least one implantable medical device; a deployment tip (22, 72) comprising at least one opening (225, 725) configured to receive the holding element extending therethrough in sliding engagement; and a base member comprising a channel and a sidewall (201, 202, 203), within which the channel extends, the sidewall including a distal segment configured for attachment of the deployment tip thereto; wherein, when the deployment tip is attached to the distal segment of the base member, and the holding element extends through the opening of the deployment tip, the channel of the base member receives the holding element in sliding engagement therewith, so that the conduit of the holding element is in communication with the channel, and the holding element and the base member slide relative to one another between a first position and a second position, the first position at which the holding element extends distally from the attached deployment tip, and over a length sufficient to receive the mounting of the anchor sleeve on the outer surface thereof, and the second position at which the length of the holding element is recessed proximally from the at least one opening of the attached deployment tip; and the deployment tip is configured to engage an end of the anchor sleeve, when the anchor sleeve is mounted on the holding element, the deployment tip is attached to the base member, and the holding element extends through the at least one opening of the deployment tip, the engagement with the end of the anchor sleeve for pushing the mounted anchor sleeve distally along the outer surface of the holding element as the holding element and base member slide from the first position to the second position.