AWS SDK Version 3 for .NET
API Reference

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Updates the description of a customer master key (CMK). To see the decription of a CMK, use DescribeKey.

You cannot perform this operation on a CMK in a different AWS account.


For .NET Core and PCL this operation is only available in asynchronous form. Please refer to UpdateKeyDescriptionAsync.

Namespace: Amazon.KeyManagementService
Assembly: AWSSDK.KeyManagementService.dll
Version: 3.x.y.z


public virtual UpdateKeyDescriptionResponse UpdateKeyDescription(
         String keyId,
         String description
Type: System.String

A unique identifier for the customer master key (CMK). Specify the key ID or the Amazon Resource Name (ARN) of the CMK. For example: Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab To get the key ID and key ARN for a CMK, use ListKeys or DescribeKey.

Type: System.String

New description for the CMK.

Return Value
The response from the UpdateKeyDescription service method, as returned by KeyManagementService.


DependencyTimeoutException The system timed out while trying to fulfill the request. The request can be retried.
InvalidArnException The request was rejected because a specified ARN was not valid.
KMSInternalException The request was rejected because an internal exception occurred. The request can be retried.
KMSInvalidStateException The request was rejected because the state of the specified resource is not valid for this request. For more information about how key state affects the use of a CMK, see How Key State Affects Use of a Customer Master Key in the AWS Key Management Service Developer Guide.
NotFoundException The request was rejected because the specified entity or resource could not be found.

Version Information

.NET Framework:
Supported in: 4.5, 4.0, 3.5

Portable Class Library:
Supported in: Windows Store Apps
Supported in: Windows Phone 8.1
Supported in: Xamarin Android
Supported in: Xamarin iOS (Unified)
Supported in: Xamarin.Forms

See Also