Say a user somehow ends up on https://tools.wmflabs.org/wikidata-todo/around.html?lat=24.258694&lon=120.828167&radius=15&lang=en
User clicks a red marker.
Nothing happens.
He does not know what each red marker stands for.
He cannot find an About link to say what this page is all about.
Nor can he find a feedback or contact link.