It could be there are such tools. But they are impossible to find, setup or understand for someone who is not already an AWS expert. I recently got a $500 bill from AWS. It was impossible for me to find out which S3 buckets (or even specific files) caused these costs. I looked at this for half an hour and have used AWS before. They just don't tell you how to obtain this information. Or maybe they do, and it is so well hidden that it might as well not exist. This was a horrible user experience. As a customer, I want to know what I'm being charged for. The fact that AWS make it so difficult make me never want to use them again.