diff --git a/clients/client-sqs/src/commands/CancelMessageMoveTaskCommand.ts b/clients/client-sqs/src/commands/CancelMessageMoveTaskCommand.ts
index e647518aadc5..a650bb394a35 100644
--- a/clients/client-sqs/src/commands/CancelMessageMoveTaskCommand.ts
+++ b/clients/client-sqs/src/commands/CancelMessageMoveTaskCommand.ts
@@ -36,17 +36,24 @@ export interface CancelMessageMoveTaskCommandOutput extends CancelMessageMoveTas
 
 /**
  * @public
- * <p>Cancels a specified message movement task.</p>
+ * <p>Cancels a specified message movement task. A message movement can only be cancelled
+ *             when the current status is RUNNING. Cancelling a message movement task does not revert
+ *             the messages that have already been moved. It can only stop the messages that have not
+ *             been moved yet.</p>
  *          <note>
  *             <ul>
  *                <li>
- *                   <p>A message movement can only be cancelled when the current status is
- *                         RUNNING.</p>
+ *                   <p>This action is currently limited to supporting message redrive from <a href="https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-dead-letter-queues.html">dead-letter queues (DLQs)</a> only. In this context, the source
+ *                         queue is the dead-letter queue (DLQ), while the destination queue can be the
+ *                         original source queue (from which the messages were driven to the
+ *                         dead-letter-queue), or a custom destination queue. </p>
  *                </li>
  *                <li>
- *                   <p>Cancelling a message movement task does not revert the messages that have
- *                         already been moved. It can only stop the messages that have not been moved
- *                         yet.</p>
+ *                   <p>Currently, only standard queues are supported.</p>
+ *                </li>
+ *                <li>
+ *                   <p>Only one active message movement task is supported per queue at any given
+ *                         time.</p>
  *                </li>
  *             </ul>
  *          </note>
diff --git a/clients/client-sqs/src/commands/ListMessageMoveTasksCommand.ts b/clients/client-sqs/src/commands/ListMessageMoveTasksCommand.ts
index 0f20c7a9ca80..fdc6d11f694b 100644
--- a/clients/client-sqs/src/commands/ListMessageMoveTasksCommand.ts
+++ b/clients/client-sqs/src/commands/ListMessageMoveTasksCommand.ts
@@ -38,6 +38,23 @@ export interface ListMessageMoveTasksCommandOutput extends ListMessageMoveTasksR
  * @public
  * <p>Gets the most recent message movement tasks (up to 10) under a specific source
  *             queue.</p>
+ *          <note>
+ *             <ul>
+ *                <li>
+ *                   <p>This action is currently limited to supporting message redrive from <a href="https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-dead-letter-queues.html">dead-letter queues (DLQs)</a> only. In this context, the source
+ *                         queue is the dead-letter queue (DLQ), while the destination queue can be the
+ *                         original source queue (from which the messages were driven to the
+ *                         dead-letter-queue), or a custom destination queue. </p>
+ *                </li>
+ *                <li>
+ *                   <p>Currently, only standard queues are supported.</p>
+ *                </li>
+ *                <li>
+ *                   <p>Only one active message movement task is supported per queue at any given
+ *                         time.</p>
+ *                </li>
+ *             </ul>
+ *          </note>
  * @example
  * Use a bare-bones client and the command you need to make an API call.
  * ```javascript
diff --git a/clients/client-sqs/src/commands/PurgeQueueCommand.ts b/clients/client-sqs/src/commands/PurgeQueueCommand.ts
index 181fcf03c65b..85c17d5a2e2e 100644
--- a/clients/client-sqs/src/commands/PurgeQueueCommand.ts
+++ b/clients/client-sqs/src/commands/PurgeQueueCommand.ts
@@ -36,8 +36,8 @@ export interface PurgeQueueCommandOutput extends __MetadataBearer {}
 
 /**
  * @public
- * <p>Deletes the messages in a queue specified by the <code>QueueURL</code>
- *             parameter.</p>
+ * <p>Deletes available messages in a queue (including in-flight messages) specified by the
+ *                 <code>QueueURL</code> parameter.</p>
  *          <important>
  *             <p>When you use the <code>PurgeQueue</code> action, you can't retrieve any messages
  *                 deleted from a queue.</p>
diff --git a/clients/client-sqs/src/commands/StartMessageMoveTaskCommand.ts b/clients/client-sqs/src/commands/StartMessageMoveTaskCommand.ts
index c236fdf654d3..330e78b15f46 100644
--- a/clients/client-sqs/src/commands/StartMessageMoveTaskCommand.ts
+++ b/clients/client-sqs/src/commands/StartMessageMoveTaskCommand.ts
@@ -41,14 +41,20 @@ export interface StartMessageMoveTaskCommandOutput extends StartMessageMoveTaskR
  *          <note>
  *             <ul>
  *                <li>
- *                   <p>This action is currently limited to supporting message redrive from
- *                         dead-letter queues (DLQs) only. In this context, the source queue is the
- *                         dead-letter queue (DLQ), while the destination queue can be the original
- *                         source queue (from which the messages were driven to the dead-letter-queue),
- *                         or a custom destination queue. </p>
+ *                   <p>This action is currently limited to supporting message redrive from queues
+ *                         that are configured as <a href="https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-dead-letter-queues.html">dead-letter queues (DLQs)</a> of other Amazon SQS queues only. Non-SQS
+ *                         queue sources of dead-letter queues, such as Lambda or Amazon SNS topics, are
+ *                         currently not supported.</p>
  *                </li>
  *                <li>
- *                   <p>Currently, only standard queues are supported.</p>
+ *                   <p>In dead-letter queues redrive context, the
+ *                             <code>StartMessageMoveTask</code> the source queue is the DLQ, while the
+ *                         destination queue can be the original source queue (from which the messages
+ *                         were driven to the dead-letter-queue), or a custom destination queue.</p>
+ *                </li>
+ *                <li>
+ *                   <p>Currently, only standard queues support redrive. FIFO queues don't support
+ *                         redrive.</p>
  *                </li>
  *                <li>
  *                   <p>Only one active message movement task is supported per queue at any given
diff --git a/clients/client-sqs/src/models/models_0.ts b/clients/client-sqs/src/models/models_0.ts
index a7fa22e2742b..cc2012a811e8 100644
--- a/clients/client-sqs/src/models/models_0.ts
+++ b/clients/client-sqs/src/models/models_0.ts
@@ -1391,8 +1391,8 @@ export interface ListQueuesResult {
   NextToken?: string;
 
   /**
-   * <p>A list of queue URLs, up to 1,000 entries, or the value of <code>MaxResults</code> that you sent in
-   *             the request.</p>
+   * <p>A list of queue URLs, up to 1,000 entries, or the value of <code>MaxResults</code>
+   *             that you sent in the request.</p>
    */
   QueueUrls?: string[];
 }
@@ -2644,7 +2644,9 @@ export interface SetQueueAttributesRequest {
 export interface StartMessageMoveTaskRequest {
   /**
    * <p>The ARN of the queue that contains the messages to be moved to another queue.
-   *             Currently, only dead-letter queue (DLQ) ARNs are accepted.</p>
+   *             Currently, only ARNs of dead-letter queues (DLQs) whose sources are other Amazon SQS queues
+   *             are accepted. DLQs whose sources are non-SQS queues, such as Lambda or Amazon SNS topics, are
+   *             not currently supported.</p>
    */
   SourceArn: string | undefined;
 
diff --git a/codegen/sdk-codegen/aws-models/sqs.json b/codegen/sdk-codegen/aws-models/sqs.json
index 00433f942991..87e3a5d55e01 100644
--- a/codegen/sdk-codegen/aws-models/sqs.json
+++ b/codegen/sdk-codegen/aws-models/sqs.json
@@ -1344,7 +1344,7 @@
         }
       ],
       "traits": {
-        "smithy.api#documentation": "<p>Cancels a specified message movement task.</p>\n         <note>\n            <ul>\n               <li>\n                  <p>A message movement can only be cancelled when the current status is\n                        RUNNING.</p>\n               </li>\n               <li>\n                  <p>Cancelling a message movement task does not revert the messages that have\n                        already been moved. It can only stop the messages that have not been moved\n                        yet.</p>\n               </li>\n            </ul>\n         </note>"
+        "smithy.api#documentation": "<p>Cancels a specified message movement task. A message movement can only be cancelled\n            when the current status is RUNNING. Cancelling a message movement task does not revert\n            the messages that have already been moved. It can only stop the messages that have not\n            been moved yet.</p>\n         <note>\n            <ul>\n               <li>\n                  <p>This action is currently limited to supporting message redrive from <a href=\"https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-dead-letter-queues.html\">dead-letter queues (DLQs)</a> only. In this context, the source\n                        queue is the dead-letter queue (DLQ), while the destination queue can be the\n                        original source queue (from which the messages were driven to the\n                        dead-letter-queue), or a custom destination queue. </p>\n               </li>\n               <li>\n                  <p>Currently, only standard queues are supported.</p>\n               </li>\n               <li>\n                  <p>Only one active message movement task is supported per queue at any given\n                        time.</p>\n               </li>\n            </ul>\n         </note>"
       }
     },
     "com.amazonaws.sqs#CancelMessageMoveTaskRequest": {
@@ -2086,7 +2086,7 @@
         }
       ],
       "traits": {
-        "smithy.api#documentation": "<p>Gets the most recent message movement tasks (up to 10) under a specific source\n            queue.</p>"
+        "smithy.api#documentation": "<p>Gets the most recent message movement tasks (up to 10) under a specific source\n            queue.</p>\n         <note>\n            <ul>\n               <li>\n                  <p>This action is currently limited to supporting message redrive from <a href=\"https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-dead-letter-queues.html\">dead-letter queues (DLQs)</a> only. In this context, the source\n                        queue is the dead-letter queue (DLQ), while the destination queue can be the\n                        original source queue (from which the messages were driven to the\n                        dead-letter-queue), or a custom destination queue. </p>\n               </li>\n               <li>\n                  <p>Currently, only standard queues are supported.</p>\n               </li>\n               <li>\n                  <p>Only one active message movement task is supported per queue at any given\n                        time.</p>\n               </li>\n            </ul>\n         </note>"
       }
     },
     "com.amazonaws.sqs#ListMessageMoveTasksRequest": {
@@ -2299,7 +2299,7 @@
         "QueueUrls": {
           "target": "com.amazonaws.sqs#QueueUrlList",
           "traits": {
-            "smithy.api#documentation": "<p>A list of queue URLs, up to 1,000 entries, or the value of <code>MaxResults</code> that you sent in\n            the request.</p>",
+            "smithy.api#documentation": "<p>A list of queue URLs, up to 1,000 entries, or the value of <code>MaxResults</code>\n            that you sent in the request.</p>",
             "smithy.api#xmlFlattened": {},
             "smithy.api#xmlName": "QueueUrl"
           }
@@ -2629,7 +2629,7 @@
         }
       ],
       "traits": {
-        "smithy.api#documentation": "<p>Deletes the messages in a queue specified by the <code>QueueURL</code>\n            parameter.</p>\n         <important>\n            <p>When you use the <code>PurgeQueue</code> action, you can't retrieve any messages\n                deleted from a queue.</p>\n            <p>The message deletion process takes up to 60 seconds. We recommend waiting for 60\n                seconds regardless of your queue's size. </p>\n         </important>\n         <p>Messages sent to the queue <i>before</i> you call\n                <code>PurgeQueue</code> might be received but are deleted within the next\n            minute.</p>\n         <p>Messages sent to the queue <i>after</i> you call <code>PurgeQueue</code>\n            might be deleted while the queue is being purged.</p>"
+        "smithy.api#documentation": "<p>Deletes available messages in a queue (including in-flight messages) specified by the\n                <code>QueueURL</code> parameter.</p>\n         <important>\n            <p>When you use the <code>PurgeQueue</code> action, you can't retrieve any messages\n                deleted from a queue.</p>\n            <p>The message deletion process takes up to 60 seconds. We recommend waiting for 60\n                seconds regardless of your queue's size. </p>\n         </important>\n         <p>Messages sent to the queue <i>before</i> you call\n                <code>PurgeQueue</code> might be received but are deleted within the next\n            minute.</p>\n         <p>Messages sent to the queue <i>after</i> you call <code>PurgeQueue</code>\n            might be deleted while the queue is being purged.</p>"
       }
     },
     "com.amazonaws.sqs#PurgeQueueInProgress": {
@@ -3383,7 +3383,7 @@
         }
       ],
       "traits": {
-        "smithy.api#documentation": "<p>Starts an asynchronous task to move messages from a specified source queue to a\n            specified destination queue.</p>\n         <note>\n            <ul>\n               <li>\n                  <p>This action is currently limited to supporting message redrive from\n                        dead-letter queues (DLQs) only. In this context, the source queue is the\n                        dead-letter queue (DLQ), while the destination queue can be the original\n                        source queue (from which the messages were driven to the dead-letter-queue),\n                        or a custom destination queue. </p>\n               </li>\n               <li>\n                  <p>Currently, only standard queues are supported.</p>\n               </li>\n               <li>\n                  <p>Only one active message movement task is supported per queue at any given\n                        time.</p>\n               </li>\n            </ul>\n         </note>"
+        "smithy.api#documentation": "<p>Starts an asynchronous task to move messages from a specified source queue to a\n            specified destination queue.</p>\n         <note>\n            <ul>\n               <li>\n                  <p>This action is currently limited to supporting message redrive from queues\n                        that are configured as <a href=\"https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-dead-letter-queues.html\">dead-letter queues (DLQs)</a> of other Amazon SQS queues only. Non-SQS\n                        queue sources of dead-letter queues, such as Lambda or Amazon SNS topics, are\n                        currently not supported.</p>\n               </li>\n               <li>\n                  <p>In dead-letter queues redrive context, the\n                            <code>StartMessageMoveTask</code> the source queue is the DLQ, while the\n                        destination queue can be the original source queue (from which the messages\n                        were driven to the dead-letter-queue), or a custom destination queue.</p>\n               </li>\n               <li>\n                  <p>Currently, only standard queues support redrive. FIFO queues don't support\n                        redrive.</p>\n               </li>\n               <li>\n                  <p>Only one active message movement task is supported per queue at any given\n                        time.</p>\n               </li>\n            </ul>\n         </note>"
       }
     },
     "com.amazonaws.sqs#StartMessageMoveTaskRequest": {
@@ -3392,7 +3392,7 @@
         "SourceArn": {
           "target": "com.amazonaws.sqs#String",
           "traits": {
-            "smithy.api#documentation": "<p>The ARN of the queue that contains the messages to be moved to another queue.\n            Currently, only dead-letter queue (DLQ) ARNs are accepted.</p>",
+            "smithy.api#documentation": "<p>The ARN of the queue that contains the messages to be moved to another queue.\n            Currently, only ARNs of dead-letter queues (DLQs) whose sources are other Amazon SQS queues\n            are accepted. DLQs whose sources are non-SQS queues, such as Lambda or Amazon SNS topics, are\n            not currently supported.</p>",
             "smithy.api#required": {}
           }
         },