That much is certain. Beyond the bare fact of its existence in the official record, almost nothing has been made publicly available about it, which places it in an odd category: a named, catalogued monument that remains, for now, effectively opaque.

Enclosures are among the most common monument types in the Irish landscape. The term covers a wide range of features, from the circular banks of a ringfort, which would have enclosed a farmstead during the early medieval period, to prehistoric ceremonial boundaries and later agricultural enclosures. Without further detail it is impossible to say which kind of structure sits in Keelhilla, or what period it belongs to. Clare is a county with a dense and varied archaeological record, from the Burren's limestone pavements dotted with megalithic tombs to the river valleys rich in ringforts and cashels, the latter being stone-walled enclosures typical of early Christian Ireland. Whether Keelhilla's enclosure fits any of those familiar patterns remains an open question.