Why doesn't 'decription' (or other) metadata display in Flash Builder?
If you have set: [Test (description="This is a test")], description metadata is preserved for each test. So, for instance, someone could choose to output it when a test fails.
However, the JUnit XML output doesn't have this feature, nor does flash builder support it, so there really isn't anywhere anyone would see it today unless they were creating a custom listener. We are hoping future versions of the flash builder plugin will choose to display this data to the user.
We don't control what Adobe chooses to display in their plugin. You can't filter or sort by a comment in code but you can by metadata. Ultimately, if you want to see it you need somewhere to display it or some way to use it. We use it quite successfully but Adobe has not chosen to use it in their display as of yet.