It has a star-shaped plan composed of four salient angles (redans). On the landward side, the larger angles have sentry boxes (or watchtowers) at their vertices and are connected by a curtain wall where the round-arched entrance gate is located. On the seaward side, the redans are smaller and flank a half-moon battery with a barbette platform (an open platform for artillery). The parapet of the walls has merlons and embrasures. Inside, two single-story rectangular buildings flank the parade ground. The layout shares the same general design as the forts of Areosa and Montedor, in the same region, raising the possibility that they were designed by the same military engineer. Despite its "small dimensions," its structure and defensive capability allow it to be classified as a "true fortress." Such a classification suggests that its typology, from the perspective of the time or modern catalogers, did not depend exclusively on physical scale but also on the complexity of its bastioned design (star-shaped plan, crossfire capability) and its strategic function integrated into a regional defensive system.