Amazon Neptune now supports copying DB cluster resources tags to DB snapshots

You can use Amazon Neptune resources tags to add metadata and apply access policies to your Amazon Neptune resources. Now, you can allow resource tags set on your Neptune clusters to be automatically copied to any automated or manual database snapshots that are created from your clusters. Tags can be used with AWS Identity and Access Management (IAM) policies to manage access to Neptune resources and control what actions can be applied to those resources.

Source:: Amazon AWS