AWS IAM Policies: Creating an IAM Policy & Best Practices
· via Spacelift
Summary: Everything in AWS passes through IAM evaluation, and policy JSON is where security intentions become real. The guide covers how the policy types combine (identity, resource, permissions boundaries, SCPs) and the tooling that catches mistakes before production does. Least privilege is iterative: start narrow, widen from access denied errors, version every change.
Who should read it: anyone writing IAM JSON by hand, and engineers who inherited policies with stars in places stars should not be.