At en.wp a user comments:
"The tooltip with a "puzzle" icon that appears when clicking on a template should contain the name of the template used. This would allow readers to be aware of which template they're about to change and would make the Templates interface [[self-documenting]], teaching by example the existence of the most common templates.
For example, the next screenshot would contain the word "Chembox" besides the puzzle icon:"
Screenshot: [[File:VisualEditor - Template editing 1.png]]