Most of the times, the description that certain links lack is already present in the thread, posted by the person who asked the question. For example:

- Help, where can I find foutons with penguins?

- You can find some here

It would make little difference (regarding Search results) if the reply was "- You can find foutons with penguins here.", since the phrase was already mentioned by the user who asked. But you have a point, descriptive links generally are a Good Thing.