Its defining feature is a substantial earth and stone bank that traces the perimeter, nearly four metres wide in places, with traces of stone facing still visible on the northern interior and western exterior. The bank stands more prominently on the outside than within, suggesting it was designed as much to present a boundary to the outside world as to contain what lay inside. That asymmetry gives the site a faintly purposeful quality, even in its current worn state.

Enclosures of this kind, broadly circular or sub-circular earthworks defined by a raised bank, are among the most commonly surviving field monuments in Ireland, though their functions varied considerably. Some served as ringforts, the defended farmsteads of the early medieval period; others may have had pastoral or ceremonial uses. At Toor, the bank has been worn down along the northern and southern sides, which is typical of centuries of agricultural activity gradually eroding earthworks that were never maintained for structural purposes. What makes this particular example quietly interesting is the presence of an L-shaped structure built against the inner face of the bank at the south-east, measuring roughly 4.7 metres by 4.3 metres. Such internal structures within enclosures can represent later insertions, perhaps a small shelter or outbuilding added long after the original bank was raised, though the relationship between the two here is not firmly dated.

A grove of conifers now occupies the eastern quadrant of the interior, which both obscures and, in a way, preserves that portion of the site from ground disturbance. The trees give the enclosure an unexpectedly sheltered character from certain angles, the planted timber contrasting with the much older earthwork beneath it.