Describe the feature and the current behavior/state

Example: Open menu math equations. The items there have the info attribute set in uiconfig.xml. It is presented in the statusbar (for ex. The gather* environment is an unnumbered gather environment) when you hover over the items with the cursor.
Add the menu to the math toolbar and repeat the procedure with these items in the toolbar. No info is shown.

Who will benefit with this feature?

All those who want to use toolbars for quick access to items and need only small hints to decide which item to use.

Any Other info

No idea how this is done in the menus and how this can be ported to the toolbars.