How Do I Use AI for Product Descriptions Without Losing a Brand’s Voice?

I’m considering using an AI writing tool to speed up product descriptions for a small online store. The drafts are clear, but they tend to sound more polished and generic than the way we usually speak to customers.

For anyone using AI to write product copy, what do you do to keep the brand voice in product descriptions recognizable? Do you give the tool examples of past copy, edit every draft heavily, or use it only for research and first-pass outlines?