Hey Vitor, no stress, it's great already :-)
If you can build in descriptions, then I can always copy and paste the text I want into Alfred, so auto setting the description from highlight isn't even necessary.
When I add a description, it is normally for two reasons -
1) It helps me distinguish between lots of similar links. For example, I was looking for software earlier that allows sharing of a mouse and keyboard between computers, and bookmarked a few, noting in the description the relative advantages of each.
2) If I can't really remember a link well and I do a search, tags are great, but the description can be rich in keywords too, without inflating my tag cloud.
Best,
Alex