This roughly rectangular enclosure measures approximately 24.5 metres from north to south and 23 metres from east to west, its boundaries marked by an earthen bank that rises about 60 centimetres on the interior side and 80 centimetres on the exterior. The site's defensive character becomes clear when you trace the external fosse, or ditch, that runs alongside the bank; though now only 45 centimetres deep with a base width of 3.3 metres, it would have once formed a more formidable barrier when filled with water.

The earthworks show varying states of preservation around the perimeter, telling their own story of time's passage. To the north-northeast, an outer counterscarp bank still stands at about 60 centimetres high, providing evidence of the site's original elaborate defensive design. However, the northwestern section has fared less well, where centuries of erosion have reduced the once-prominent bank to little more than a low scarp. The interior of the enclosure, now level and marshy, would have once held timber buildings; the main residence and perhaps outbuildings of a medieval landowner who sought both status and security behind these water-filled defences.

Such moated sites are scattered across the Irish countryside, particularly in areas of Anglo-Norman settlement during the 13th and 14th centuries. They served as fortified farmsteads for lesser nobility and wealthy farmers, offering protection whilst demonstrating social standing through their impressive earthwork construction. The marshy conditions within Cloonty's interior today ironically echo its medieval past, when controlled flooding of the surrounding ditch would have been a key defensive feature, creating an island refuge in the Limerick landscape.