<p>Adds or updates the policy that is specified as the IAM role's permissions boundary. You can use an Amazon Web Services managed policy or a customer managed policy to set the boundary for a role. Use the boundary to control the maximum permissions that the role can have. Setting a permissions boundary is an advanced feature that can affect the permissions for the role.</p> <p>You cannot set the boundary for a service-linked role.</p> <important> <p>Policies used as permissions boundaries do not provide permissions. You must also attach a permissions policy to the role. To learn how the effective permissions for a role are evaluated, see <a href="https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_evaluation-logic.html">IAM JSON policy evaluation logic</a> in the IAM User Guide. </p> </important>

{
  "success": true,
  "data": {
    "id": "abc123",
    "created_at": "2025-01-01T00:00:00Z"
  }
}

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request parameters"
  }
}