Are you asking for the really important stuff?
In many cases, creative projects are briefed on the output (website/logo/social campaign). But most of the actual work takes place at the beginning - that's when the problem is interrogated, and the creative solution is explored.
The end result is exactly that - it's how the brand shines AFTER you've put in all the hard yards to discover what the brand means, what its purpose is and how it behaves. We know what you're thinking! How much extra will this cost? Well - to be honest it will cost more, but is it wise to launch your business idea without thinking about those things?
The person designing your new brand needs to get emotionally invested in the project to do their best work. A good brand designer will always be transparent and guide you through the process, making sure that every penny goes into building you the best brand they can - not on countless amends for a logo because it doesn't hit the mark.
What can you do?
Become a 'brand strategy apologist'. Make time to have a discovery session with your brand designers and talk about what the brand means to you, what you want it to achieve and how you think it might look. Don't worry, if you don't have the answers yet a good brand designer will always work with you to find out what you need to know.