A masonry tuck pointing tool device is provided. The device is designed to store, control, and dispense mortar with precision into vertical brick joints during the tuck pointing process. The device comprises a body having a bottom wall, parallel side walls, and at least one rear wall forming an interior space for mortar storage. A front opening allows for precise mortar application from the interior space. In one embodiment, the marking system on the side wall provides depth measurements, enabling controlled mortar application to ensure a strong bond and prevent overfilling or underfilling. The method of use involves filling the interior space with mortar, aligning the front opening with a joint, using a brick jointer to push the mortar forward and outwards from the interior space, and smoothing the applied mortar for a professional finish.