Amazon Braket service-linked role
When you enable Amazon Braket, a service-linked role is created in your account.
A service-linked role is a unique type of IAM role that, in this case, is linked directly to Amazon Braket. The Amazon Braket service-linked role is predefined to include all the permissions that Braket requires when calling other AWS services on your behalf.
A service-linked role makes setting up Amazon Braket easier because you don't have to add the necessary permissions manually. Amazon Braket defines the permissions of its service-linked roles. Unless you change these definitions, only Amazon Braket can assume its roles. The defined permissions include the trust policy and the permissions policy. The permissions policy cannot be attached to any other IAM entity.
The service-linked role that Amazon Braket sets up is part of the AWS Identity and Access Management (IAM) service-linked roles capability. For information about other AWS services that support service-linked roles, see AWS Services That Work with IAM and look for the services that have Yes in the Service-Linked Role column. Choose a Yes with a link to view the service-linked role documentation for that service.
For more information on the AWS managed policy for service-linked roles, see AmazonBraketServiceRolePolicy.