Your descriptions in Google Places and Yelp are an absolute must for trust building and local SEO. Local businesses should start stimulating reviews in all the right places to their marketing checklist.
Google has started indexing local search with phrases that go with things like reviews. At the moment, this is just a Google Maps function because earlier this week they added descriptive terms to Google Map searches. However, Google is claiming that it will spread to Place Search on Google.com and Google Maps for Mobile Soon.
Local businesses should start keyword phrases for those reviews people are so anxious to write!