A tool (100, 500) for deploying an anchor sleeve onto an implantable elongate medical device, the tool comprising: a handle member (210B, 500-H) including a gripping portion (213, 513), an elongate tubular member (211, 511) extending distally from the gripping portion (213, 513), and a junction between the tubular member (211, 511) and the gripping portion, the gripping portion defining a longitudinal axis (15, 5, 6, 7) of the tool (100, 500), the tubular member (211, 511) having an outer surface sized for mounting the anchor sleeve thereon, and an inner surface defining a lumen extending longitudinally from a proximal opening, in proximity to the junction, to a distal opening, and the lumen being sized to receive a proximal length of the implantable device therein; and an elongate base member (200, 500-B) including a deployment tip (201, 501) and an elongate channel (205, 505-D), the channel extending proximally from an opening at the deployment tip; wherein the channel (205, 505-D) of the base member receives the tubular member (211, 511) of the handle member (210B, 500-H) in sliding engagement, when the gripping portion (213, 513) of the handle member (210B, 500-H) is fitted around the base member; and the deployment tip (201, 501) of the base member (200, 500-B) is configured to engage with an end of the anchor sleeve, when the anchor sleeve is mounted on the tubular member (211, 511) of the handle member (210B, 500-H), and when the gripping portion (213, 513) of the handle member (210B, 500-H) is fitted around the base member; wherein a distal end portion of the tubular member (211, 511) is laterally offset from the gripping portion (213, 513), and the deployment tip (201, 501) of the base member (200, 500-B) is similarly laterally offset from the longitudinal axis (15, 5, 6, 7) of the tool (100, 500). a handle member (210B, 500-H) including a gripping portion (213, 513), an elongate tubular member (211, 511) extending distally from the gripping portion (213, 513), and a junction between the tubular member (211, 511) and the gripping portion, the gripping portion defining a longitudinal axis (15, 5, 6, 7) of the tool (100, 500), the tubular member (211, 511) having an outer surface sized for mounting the anchor sleeve thereon, and an inner surface defining a lumen extending longitudinally from a proximal opening, in proximity to the junction, to a distal opening, and the lumen being sized to receive a proximal length of the implantable device therein; and an elongate base member (200, 500-B) including a deployment tip (201, 501) and an elongate channel (205, 505-D), the channel extending proximally from an opening at the deployment tip; wherein the channel (205, 505-D) of the base member receives the tubular member (211, 511) of the handle member (210B, 500-H) in sliding engagement, when the gripping portion (213, 513) of the handle member (210B, 500-H) is fitted around the base member; and the deployment tip (201, 501) of the base member (200, 500-B) is configured to engage with an end of the anchor sleeve, when the anchor sleeve is mounted on the tubular member (211, 511) of the handle member (210B, 500-H), and when the gripping portion (213, 513) of the handle member (210B, 500-H) is fitted around the base member; wherein a distal end portion of the tubular member (211, 511) is laterally offset from the gripping portion (213, 513), and the deployment tip (201, 501) of the base member (200, 500-B) is similarly laterally offset from the longitudinal axis (15, 5, 6, 7) of the tool (100, 500).