This is perhaps a weird question perhaps, but since WF is built on top of Bootstrap shouldn’t it be fairly easy to add some of the already in place features such as “Tool Tips”?
As far as I know, Webflow is not built on top of, and has no relation with Bootstrap. People have been asking the webflow devs about an optional Bootstrap integration, but nobody really knows if and when it’s coming. Modals and tooltips have also been announced as upcoming features, but as I said, nobody knows when the next big update is coming or what it will contain.
Webflow uses Bootstrap 3’s responsive rows and cols if I have my information right. As for adding Bootstrap you can if you add bootstrap css and javascript in Custom Code area. Then add the code in your site. Problem is you have to publish or export to see it.