That a cave earns such a designation is not unusual in itself; Kerry's limestone and sandstone landscapes are riddled with natural cavities that have served human purposes across many centuries, from shelter and storage to ritual use. What is quietly striking about this particular site is how little is currently known about it in the public record, leaving it as little more than a name and a grid reference, a placeholder for something that may yet prove significant.

Kerry has a long tradition of cave use, and natural cavities across the county have yielded evidence of everything from prehistoric animal remains to early medieval occupation. Whether Tonavane's cave is a modest natural hollow or something more substantial is not yet clear from what has been made available. The act of recording it as a monument, however, suggests that it came to the attention of surveyors for a reason, perhaps through local knowledge, visible features at the entrance, or finds associated with the site. Caves in Ireland were sometimes used as souterrains, artificial or semi-natural underground passages associated with early medieval settlements, though equally they could be purely natural features with no direct human modification beyond seasonal use.