Can I suggest link description?

Our company is taking care of most of these companys websites:
http://www.dmoz.org/World/Lietuvių/Verslas/Finansinės_paslaugos/Bankai/

Almost all descriptions are the same or begins with the same phrase "Žinios apie banką...", so we and our clients wants to fix this to be more accurate.

Is it possible? Or I must be an Editor?

Please see the FAQ entitled "I need to change the URL/title/description/category of a listing. How can I do this?".
Your suggestion will be reviewed by a volunteer, and considered in light of the editing guidelines. Requests which do not follow those guidelines will not be accepted.