What functionality is missing? What is unsatisfying with the current situation?

The table of contents of a category can be embedded anywhere. This embed adds all the articles and categories within that category as a tree.   The links within that tree do not have a tooltip. It would be good if they would display the excerpt to better explain what this link is about. This should help users navigate the world.  

How does this feature request address the current situation?

Following a link only based on the title itself can be difficult as it might not give enough context by itself. This would increase the usefulness of this embed.