They are heavily overgrown now, folded into the pasture, but the underlying geometry is still legible: two concentric ramparts separated by a fosse, the ditch that once gave the inner enclosure its defensive depth. The outer bank has been absorbed into the townland boundary, quietly doing administrative work for centuries while its original purpose receded into the grass.

The site's Irish name, recorded by Broker in 1937 as Lios na Buidhe or Bo Buidhe, gestures at meanings involving yellow or a yellow cow, though the precise local story behind the name has not been preserved in detail. The structure itself belongs to the broad category of the rath, a type of enclosed farmstead built across Ireland roughly between the early medieval period and the coming of the Normans. Most were the homes of farming families of moderate standing, not military fortifications in any modern sense, though the banks and fosse would have kept livestock in and wolves or opportunistic neighbours out. What makes Lisnaboy slightly more intriguing than an average rath is the possible presence of a souterrain beneath its interior. Souterrains are underground stone-lined passages, typically corbelled or roofed with lintels, that were dug beneath or adjacent to ring-forts; they served variously for storage, refuge, and ventilation of perishables, and their construction required considerable effort and planning. Whether the one at Lisnaboy was ever fully investigated is not recorded.

The inner bank still stands to an internal height of about 1.5 metres along the south-east to north-east arc, dropping to a mere scarp of 0.5 metres elsewhere, which gives the site a slightly lopsided quality on the ground. The interior is grass-covered and unremarkable to the casual eye, but the bivariate earthwork, two banks rather than the single bank common to simpler raths, indicates a site of some local consequence in its day.