- Neptune adds tag‑based access control (TBAC) for IAM, allowing policies to use resource and principal tags to restrict data‑plane actions.
- Administrators can grant neptune-db:* actions only to clusters whose tags match the IAM principal’s tags, reducing lateral access and supporting organization‑wide guardrails via SCPs.
- Requires engine version 1.2.0.0+ with IAM authentication enabled and is available in all AWS regions.
Amazon Neptune now supports tag-based access control for IAM
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