Still, I don’t think it would take that much work to at least give the “circles” a “tooltip” of some sort.
Granted, many would miss reading even that - if they are already missing the “notifications of @ name mentions, replies to your posts and topics, messages, etc” for the speech bubble, would it really help much having similar for the circles too? But it might be something to consider
*Note, there is already a title “tooltip” for the icons in the list (but not the links)
What more could be done that isn’t already being done?