# Amazon managed policies for Amazon IoT TwinMaker
<a name="security-iam-awsmanpol"></a>







To add permissions to users, groups, and roles, it is easier to use Amazon managed policies than to write policies yourself. It takes time and expertise to [create IAM customer managed policies](https://docs.amazonaws.cn/IAM/latest/UserGuide/access_policies_create-console.html) that provide your team with only the permissions they need. To get started quickly, you can use our Amazon managed policies. These policies cover common use cases and are available in your Amazon Web Services account. For more information about Amazon managed policies, see [Amazon managed policies](https://docs.amazonaws.cn/IAM/latest/UserGuide/access_policies_managed-vs-inline.html#aws-managed-policies) in the *IAM User Guide*.

Amazon services maintain and update Amazon managed policies. You can't change the permissions in Amazon managed policies. Services occasionally add additional permissions to an Amazon managed policy to support new features. This type of update affects all identities (users, groups, and roles) where the policy is attached. Services are most likely to update an Amazon managed policy when a new feature is launched or when new operations become available. Services do not remove permissions from an Amazon managed policy, so policy updates won't break your existing permissions.

Additionally, Amazon supports managed policies for job functions that span multiple services. For example, the **ReadOnlyAccess** Amazon managed policy provides read-only access to all Amazon services and resources. When a service launches a new feature, Amazon adds read-only permissions for new operations and resources. For a list and descriptions of job function policies, see [Amazon managed policies for job functions](https://docs.amazonaws.cn/IAM/latest/UserGuide/access_policies_job-functions.html) in the *IAM User Guide*.









## Amazon managed policy: AWSIoTTwinMakerServiceRolePolicy
<a name="security-iam-awsmanpol-IoTTwinMakerServiceRolePolicy"></a>









You can't attach AWSIoTTwinMakerServiceRolePolicy to your IAM entities. This policy is attached to a service-linked role that allows to perform actions on your behalf. For more information, see [Service-linked role permissions for Amazon IoT TwinMaker](using-service-linked-roles.md#slr-permissions).



The role permissions policy named AWSIoTTwinMakerServiceRolePolicy allows Amazon IoT TwinMaker to complete the following actions on the specified resources:
+ Action: `iotsitewise:DescribeAsset, iotsitewise:ListAssets, iotsitewise:DescribeAssetModel, and iotsitewise:ListAssetModels, iottwinmaker:GetEntity, iottwinmaker:CreateEntity, iottwinmaker:UpdateEntity, iottwinmaker:DeleteEntity, iottwinmaker:ListEntities, iottwinmaker:GetComponentType, iottwinmaker:CreateComponentType, iottwinmaker:UpdateComponentType, iottwinmaker:DeleteComponentType, iottwinmaker:ListComponentTypes` on `all your iotsitewise asset and asset-model resources`









------
#### [ JSON ]

****  

```
{
    "Version":"2012-10-17",		 	 	 
    "Statement": [{
            "Sid": "SiteWiseAssetReadAccess",
            "Effect": "Allow",
            "Action": [
                "iotsitewise:DescribeAsset"
            ],
            "Resource": [
                "arn:aws-cn:iotsitewise:*:*:asset/*"
            ]
        },
        {
            "Sid": "SiteWiseAssetModelReadAccess",
            "Effect": "Allow",
            "Action": [
                "iotsitewise:DescribeAssetModel"
            ],
            "Resource": [
                "arn:aws-cn:iotsitewise:*:*:asset-model/*"
            ]
        },
        {
            "Sid": "SiteWiseAssetModelAndAssetListAccess",
            "Effect": "Allow",
            "Action": [
                "iotsitewise:ListAssets",
                "iotsitewise:ListAssetModels"
            ],
            "Resource": [
                "*"
            ]
        },
        {
            "Sid": "TwinMakerAccess",
            "Effect": "Allow",
            "Action": [
                "iottwinmaker:GetEntity",
                "iottwinmaker:CreateEntity",
                "iottwinmaker:UpdateEntity",
                "iottwinmaker:DeleteEntity",
                "iottwinmaker:ListEntities",
                "iottwinmaker:GetComponentType",
                "iottwinmaker:CreateComponentType",
                "iottwinmaker:UpdateComponentType",
                "iottwinmaker:DeleteComponentType",
                "iottwinmaker:ListComponentTypes"
            ],
            "Resource": [
                "arn:aws-cn:iottwinmaker:*:*:workspace/*"
            ],
            "Condition": {
                "ForAnyValue:StringEquals": {
                    "iottwinmaker:linkedServices": [
                        "IOTSITEWISE"
                    ]
                }
            }
        }
    ]
}
```

------





## Amazon IoT TwinMaker updates to Amazon managed policies
<a name="security-iam-awsmanpol-updates"></a>



View details about updates to Amazon managed policies for since this service began tracking these changes. For automatic alerts about changes to this page, subscribe to the RSS feed on the Document history page.




| Change | Description | Date | 
| --- | --- | --- | 
|  [AWSIoTTwinMakerServiceRolePolicy](#security-iam-awsmanpol-IoTTwinMakerServiceRolePolicy) – Added a policy  |  Amazon IoT TwinMaker added the role permissions policy named AWSIoTTwinMakerServiceRolePolicy which allows Amazon IoT TwinMaker to complete the following actions on the specified resources: [\[See the AWS documentation website for more details\]](http://docs.amazonaws.cn/en_us/iot-twinmaker/latest/guide/security-iam-awsmanpol.html) For more information, see [Service-linked role permissions for Amazon IoT TwinMaker](using-service-linked-roles.md#slr-permissions).  | November 17, 2023 | 
|   started tracking changes  |   started tracking changes for its Amazon managed policies.  | May 11, 2022 |