Regarding excessive LIDAR micromapping in Luxembourg

The difference here is that we have a pile of different tags to explain what’s going on here - river vs stream, intermittent, flood_prone and more.

Is there anything similar for cliffs? How high does something have to be before it counts as a “cliff” in OSM? My naive thought as a mapper and with “what people map as cliffs in the UK” would be 3m vertical or so, but there might be different opinions elsewhere.

Is anyone aware of an attempt in OSM data to say “how much of a cliff this is”?