Follow up from #1809352-139: Write tour.module and add it to core. @Dries said:
I was confused about not seeing the tour icon after applying the patch. I actually had to look at the code to figure out how it worked, and I had to look at the YAML files to figure out where a tour icon would appear. I wonder if it would be better to always show the help/tour-icon, even if no help is available. If no help is available, the (1) icon could have a different color and (2) say "No help is available for this page" when clicked. I think it would help with the discovery and learnability of this feature. For what it is worth, I had the same issues with the 'Edit' toggle for in-place editing. I personally prefer to have permanent icons (both for help mode and edit mode) that are explicit about the features not being available on specific pages, than having them disappear/appear randomly. Not sure if most people feel that way though; my opinion may not be representative for the larger audience.