Update: The current plan is to disable this and mark as as "experimental" for both 2.9 and trunk.
The new neo portal introduced a "Add Tool" link at the bottom of tool navigation panel. Click on it, it would direct user to Edit Tools page.
Refresh the page to return to Site Info list view (default view).
Choose Edit Site Information, save change and finish.
The page refreshes, but show the Edit Tools view.