An automatic wireless medical device release system may reduce the overall diameter of the medical device delivery system. The medical device delivery system may include a medical device with a looped portion at a distal end of the medical device. A capture wire may be located on a delivery tool that is distal to the medical device. The looped portion of the medical device may be attached to a bend in the capture wire. The bend in the capture wire may be maintained by a sheath covering the delivery tool. Removal of the sheath may automatically remove the bend in the capture wire, which may release the looped portion of the medical device from the capture wire.