The enclosure is a substantial one, roughly 41 metres from north to south and 70 metres from east to west, bounded by a stone wall that traces a rectangular outline around both the ruin and the graves it has long kept company with. The name Kilmoyly itself carries the familiar Irish prefix "cill", meaning a church or monastic cell, a clue that Christian activity here likely stretches back considerably further than the standing, or rather fallen, masonry might suggest.

The ruined church at the centre of this enclosure is recorded as part of the broader pattern of early ecclesiastical sites that dot the north Kerry landscape. The rectangular graveyard form, enclosed by a stone boundary wall, is a common feature of early medieval Irish church settlements, where the consecrated ground was carefully defined and maintained across many centuries of use. Beyond these structural details, the specific history of who built here, and when, remains unrecorded in what survives of the site's documentation.