That earthwork is a rath, the term used in Irish archaeology for a ringfort: a roughly circular enclosure defined by one or more earthen banks and ditches, built during the early medieval period, broadly between the fifth and twelfth centuries. Ringforts were the farmsteads of their age, the places where families lived, kept livestock, and organised daily life behind a boundary that offered both practical protection and a clear declaration of territory.

Tobermaing is a quiet corner of Kerry, and the rath there belongs to a category of monument that is simultaneously very common and very easy to overlook. Ireland has somewhere in the region of forty to fifty thousand recorded ringforts, yet each one represents a specific household, a specific patch of land, and a decision made by real people about where and how to settle. The place name alone suggests that a holy well or water source of some significance was once nearby, and the pairing of a ringfort with a named well is not unusual in the Irish landscape. Wells were often focal points for local identity, used for blessing, for gathering, and sometimes for marking boundaries, and a family choosing to settle close to one would have understood what that proximity meant to neighbours and travellers alike.

Beyond the name and the monument type, the documentary record for this particular site has not yet been made fully available in digital form, which means the specific details of its dimensions, condition, or any finds associated with it remain to be established from primary sources. What can be said is that ringforts in Kerry survive in considerable numbers across the county's varied landscape, from coastal headlands to inland hillsides, and that even an undocumented example in a well-named townland carries the quiet weight of more than a thousand years of continuous Irish agricultural memory.