While testing 678433, it took me some time to realize that we are referring to the "browser back" button rather than an interface button that wasn't functioning correctly.
In any case, I find it weird that we have a means for someone to get to the tool info page from the history page but not from the tool info page to the home page. With new changes in 678433, one can use the browser button to navigate seamlessly from tool info to the home page, but a button addition on the tool info page itself would bring a lot of clarity.