Follow Yahoo's instructions or else!
If you try to sneak around their rules they will ban you.
Don't try to break the rules by doing things like using numbers, too much gratuitous promotional language or brand names in your descriptions.
This is one situation where too much SEO in your copy can really hurt you.
This might seem odd, especially in a business that seems to be all about promoting yourself but Yahoo will frown on any title and description that reads like promotional ad copy.
What Yahoo wants is a descriptive title and description without any hype (and this includes phrases such as 'the best real estate agent in town" and "unrivalled service"
Also you improve your chances of acceptance if you can keep your meta tag description to about 15-20 words. You might as well edit it down now before Yahoo does it for you!
As Yahoo lists its sites alphabetically, it might also benefit you to choose a name that is among the first five or six letters in the alphabet. If you can come up with a suitable title for your site that starts with A, B or C then make sure you use it as it will rank you higher in the Yahoo search engine pages!