Where the more familiar rath was raised from soil and sod, the cashel relied on the stacked limestone or local fieldstone that was plentiful across the west of Ireland. These structures date broadly to the early medieval period, roughly the sixth to the twelfth centuries, and served as farmsteads, the homes of farmers and minor lords who needed a defined, defensible boundary around their dwelling and livestock. The Ooankeagh example belongs to a category of monument that Clare possesses in considerable numbers, given the county's exposure of bare karst and the ready supply of stone that came with it.

Beyond its classification and location, the specific history of this particular cashel remains difficult to recover. No details about its dimensions, condition, associated finds, or any named historical connection have been recorded in publicly accessible form. What can be said is that Ooankeagh sits in a part of Clare where the land has been occupied and worked for millennia, and where ringforts of both earthen and stone construction cluster with a density that reflects the agricultural intensity of early medieval Gaelic society. A cashel in this landscape would have been a statement of household order, a circle drawn against the open country, containing family, animals, and whatever modest wealth a farming community could accumulate.