Thanks, see https://wiki.openstreetmap.org/wiki/Names#Name_is_the_name_only

Also note that Google street view is forbidden to be used for OSM, so only add objects you have visited, or are visible in the allowed aerial imagery in your editor).

For the memorials and atworks, there are tags that can be used instead of putting a description into the name.
E.g. for the horse statue at https://www.openstreetmap.org/node/3827143367 I have added statue=animal  (see e.g. https://wiki.openstreetmap.org/wiki/Key:statue) and artwork_subject=horse (see https://wiki.openstreetmap.org/wiki/Key:artwork_subject, looks like 'figurative' would be more proper value). Sometimes it is good to put the description into 'description' tag if tags cannot express the object fully yet, but maybe in future tags will become available (new ones are created /agreed upon constantly).