On this page: https://treeherder.allizom.org/ui/help.html the builds & tests section should be automatically generated from the database and the description should be displayed too.
Ah I didn't realise it was hardcoded :( https://github.com/mozilla/treeherder-ui/blob/master/webapp/app/help.html I'd filed bug 1052489 for this, but let's keep this bug and make bug 1052489 just about the tooltips.
We've mad made further customizations to the Builds/Tests sections, manually adding links for Spidermonkey and other jobs for Releng eg. https://github.com/mozilla/treeherder-ui/pull/395/files and https://github.com/mozilla/treeherder-ui/pull/394. I am not sure if it precludes auto generation, but it seems to be evolving more towards a manually maintained model.
I'm still not keen on hardcoding things in help and having to keep them up to date. Also, to me, help shouldn't really be about lists of job names and links to their info (that should be somewhere else), but instead actual help about the webapp :-)
+1. I think those Build/Tests tables might be suitable for RTD, or something similar. :) We also have in-app tooltips on each job element which kind of replicates the information, and those often seem more informative.