Up to 50 bucket tag keys can be added for a single bucket, and each tag key can have up to 1,000 tag values. Besides, each root account can add up to 1,000 tag keys. For more information about bucket tag restrictions, please see Bucket Tag Overview.
After you add a bucket tag for your bucket, tags will be recorded in your monthly usage bill. You can download the bill and then create a pivot table (see Cost Allocation Tags) to analyze the tag-specific usage for your bucket.
You can do so as follows:
PutBucket) and operate resources that have a specified tag.