diff --git a/clients/client-ec2/src/commands/DeleteTransitGatewayRouteTableCommand.ts b/clients/client-ec2/src/commands/DeleteTransitGatewayRouteTableCommand.ts
index d8c31ef470507..cf686ad5c0657 100644
--- a/clients/client-ec2/src/commands/DeleteTransitGatewayRouteTableCommand.ts
+++ b/clients/client-ec2/src/commands/DeleteTransitGatewayRouteTableCommand.ts
@@ -32,8 +32,8 @@ export interface DeleteTransitGatewayRouteTableCommandOutput
     __MetadataBearer {}
 
 /**
- * <p>Deletes the specified transit gateway route table. You must disassociate the route table from any
- *           transit gateway route tables before you can delete it.</p>
+ * <p>Deletes the specified transit gateway route table. If there are any route tables associated with
+ *          the transit gateway route table, you must first run <a>DisassociateRouteTable</a> before you can delete the transit gateway route table. This removes any route tables associated with the transit gateway route table.</p>
  * @example
  * Use a bare-bones client and the command you need to make an API call.
  * ```javascript
diff --git a/clients/client-ec2/src/models/models_1.ts b/clients/client-ec2/src/models/models_1.ts
index 43ce057a9b754..6d93e06f00089 100644
--- a/clients/client-ec2/src/models/models_1.ts
+++ b/clients/client-ec2/src/models/models_1.ts
@@ -7071,7 +7071,10 @@ export interface LaunchTemplateInstanceNetworkInterfaceSpecificationRequest {
   Description?: string;
 
   /**
-   * <p>The device index for the network interface attachment.</p>
+   * <p>The device index for the network interface attachment. Each network interface requires
+   *             a device index. If you create a launch template that includes secondary network interfaces
+   *             but not a primary network interface, then you must add a primary network interface as a
+   *             launch parameter when you launch an instance from the template.</p>
    * @public
    */
   DeviceIndex?: number;
diff --git a/clients/client-ec2/src/models/models_2.ts b/clients/client-ec2/src/models/models_2.ts
index af2e45f3fa22f..3bb36dbfbb189 100644
--- a/clients/client-ec2/src/models/models_2.ts
+++ b/clients/client-ec2/src/models/models_2.ts
@@ -5624,7 +5624,10 @@ export type VolumeState = (typeof VolumeState)[keyof typeof VolumeState];
  */
 export interface Volume {
   /**
-   * <p>Information about the volume attachments.</p>
+   * <note>
+   *             <p>This parameter is not returned by CreateVolume.</p>
+   *          </note>
+   *          <p>Information about the volume attachments.</p>
    * @public
    */
   Attachments?: VolumeAttachment[];
@@ -5705,7 +5708,10 @@ export interface Volume {
   VolumeType?: VolumeType;
 
   /**
-   * <p>Indicates whether the volume was created using fast snapshot restore.</p>
+   * <note>
+   *             <p>This parameter is not returned by CreateVolume.</p>
+   *          </note>
+   *          <p>Indicates whether the volume was created using fast snapshot restore.</p>
    * @public
    */
   FastRestored?: boolean;
@@ -5723,7 +5729,10 @@ export interface Volume {
   Throughput?: number;
 
   /**
-   * <p>Reserved for future use.</p>
+   * <note>
+   *             <p>This parameter is not returned by CreateVolume.</p>
+   *          </note>
+   *          <p>Reserved for future use.</p>
    * @public
    */
   SseType?: SSEType;
diff --git a/clients/client-ec2/src/models/models_5.ts b/clients/client-ec2/src/models/models_5.ts
index afd400dfd37cd..09ac206e76502 100644
--- a/clients/client-ec2/src/models/models_5.ts
+++ b/clients/client-ec2/src/models/models_5.ts
@@ -1687,6 +1687,13 @@ export interface DescribeTransitGatewaysRequest {
    *                <p>
    *                   <code>transit-gateway-id</code> - The ID of the transit gateway.</p>
    *             </li>
+   *             <li>
+   *                <p>
+   *                   <code>tag-key </code>- The key/value combination of a tag assigned to the resource. Use the
+   *                tag key in the filter name and the tag value as the filter value. For example, to
+   *                find all resources that have a tag with the key <code>Owner</code> and the value <code>TeamA</code>, specify
+   *                <code>tag:Owner</code> for the filter name and <code>TeamA</code> for the filter value.</p>
+   *             </li>
    *          </ul>
    * @public
    */
diff --git a/codegen/sdk-codegen/aws-models/ec2.json b/codegen/sdk-codegen/aws-models/ec2.json
index 3e91f71e41839..15b22d9119ad7 100644
--- a/codegen/sdk-codegen/aws-models/ec2.json
+++ b/codegen/sdk-codegen/aws-models/ec2.json
@@ -25555,7 +25555,7 @@
         "target": "com.amazonaws.ec2#DeleteTransitGatewayRouteTableResult"
       },
       "traits": {
-        "smithy.api#documentation": "<p>Deletes the specified transit gateway route table. You must disassociate the route table from any\n          transit gateway route tables before you can delete it.</p>"
+        "smithy.api#documentation": "<p>Deletes the specified transit gateway route table. If there are any route tables associated with\n         the transit gateway route table, you must first run <a>DisassociateRouteTable</a> before you can delete the transit gateway route table. This removes any route tables associated with the transit gateway route table.</p>"
       }
     },
     "com.amazonaws.ec2#DeleteTransitGatewayRouteTableAnnouncement": {
@@ -39646,7 +39646,7 @@
         "Filters": {
           "target": "com.amazonaws.ec2#FilterList",
           "traits": {
-            "smithy.api#documentation": "<p>One or more filters. The possible values are:</p>\n         <ul>\n            <li>\n               <p>\n                  <code>options.propagation-default-route-table-id</code> - The ID of the default propagation route table.</p>\n            </li>\n            <li>\n               <p>\n                  <code>options.amazon-side-asn</code> - The private ASN for the Amazon side of a BGP session.</p>\n            </li>\n            <li>\n               <p>\n                  <code>options.association-default-route-table-id</code> - The ID of the default association route table.</p>\n            </li>\n            <li>\n               <p>\n                  <code>options.auto-accept-shared-attachments</code> - Indicates whether there is automatic acceptance of attachment requests (<code>enable</code> | <code>disable</code>).</p>\n            </li>\n            <li>\n               <p>\n                  <code>options.default-route-table-association</code> - Indicates whether resource attachments are automatically \n               associated with the default association route table (<code>enable</code> | <code>disable</code>).</p>\n            </li>\n            <li>\n               <p>\n                  <code>options.default-route-table-propagation</code> - Indicates whether resource attachments automatically propagate \n               routes to the default propagation route table (<code>enable</code> | <code>disable</code>).</p>\n            </li>\n            <li>\n               <p>\n                  <code>options.dns-support</code> - Indicates whether DNS support is enabled (<code>enable</code> | <code>disable</code>).</p>\n            </li>\n            <li>\n               <p>\n                  <code>options.vpn-ecmp-support</code> - Indicates whether Equal Cost Multipath Protocol support is enabled  (<code>enable</code> | <code>disable</code>).</p>\n            </li>\n            <li>\n               <p>\n                  <code>owner-id</code> - The ID of the Amazon Web Services account that owns the transit gateway.</p>\n            </li>\n            <li>\n               <p>\n                  <code>state</code> - The state of the transit gateway (<code>available</code> | <code>deleted</code> | <code>deleting</code> | <code>modifying</code> | <code>pending</code>).</p>\n            </li>\n            <li>\n               <p>\n                  <code>transit-gateway-id</code> - The ID of the transit gateway.</p>\n            </li>\n         </ul>",
+            "smithy.api#documentation": "<p>One or more filters. The possible values are:</p>\n         <ul>\n            <li>\n               <p>\n                  <code>options.propagation-default-route-table-id</code> - The ID of the default propagation route table.</p>\n            </li>\n            <li>\n               <p>\n                  <code>options.amazon-side-asn</code> - The private ASN for the Amazon side of a BGP session.</p>\n            </li>\n            <li>\n               <p>\n                  <code>options.association-default-route-table-id</code> - The ID of the default association route table.</p>\n            </li>\n            <li>\n               <p>\n                  <code>options.auto-accept-shared-attachments</code> - Indicates whether there is automatic acceptance of attachment requests (<code>enable</code> | <code>disable</code>).</p>\n            </li>\n            <li>\n               <p>\n                  <code>options.default-route-table-association</code> - Indicates whether resource attachments are automatically \n               associated with the default association route table (<code>enable</code> | <code>disable</code>).</p>\n            </li>\n            <li>\n               <p>\n                  <code>options.default-route-table-propagation</code> - Indicates whether resource attachments automatically propagate \n               routes to the default propagation route table (<code>enable</code> | <code>disable</code>).</p>\n            </li>\n            <li>\n               <p>\n                  <code>options.dns-support</code> - Indicates whether DNS support is enabled (<code>enable</code> | <code>disable</code>).</p>\n            </li>\n            <li>\n               <p>\n                  <code>options.vpn-ecmp-support</code> - Indicates whether Equal Cost Multipath Protocol support is enabled  (<code>enable</code> | <code>disable</code>).</p>\n            </li>\n            <li>\n               <p>\n                  <code>owner-id</code> - The ID of the Amazon Web Services account that owns the transit gateway.</p>\n            </li>\n            <li>\n               <p>\n                  <code>state</code> - The state of the transit gateway (<code>available</code> | <code>deleted</code> | <code>deleting</code> | <code>modifying</code> | <code>pending</code>).</p>\n            </li>\n            <li>\n               <p>\n                  <code>transit-gateway-id</code> - The ID of the transit gateway.</p>\n            </li>\n            <li>\n               <p>\n                  <code>tag-key </code>- The key/value combination of a tag assigned to the resource. Use the\n               tag key in the filter name and the tag value as the filter value. For example, to\n               find all resources that have a tag with the key <code>Owner</code> and the value <code>TeamA</code>, specify\n               <code>tag:Owner</code> for the filter name and <code>TeamA</code> for the filter value.</p>\n            </li>\n         </ul>",
             "smithy.api#xmlName": "Filter"
           }
         },
@@ -71008,7 +71008,7 @@
         "DeviceIndex": {
           "target": "com.amazonaws.ec2#Integer",
           "traits": {
-            "smithy.api#documentation": "<p>The device index for the network interface attachment.</p>"
+            "smithy.api#documentation": "<p>The device index for the network interface attachment. Each network interface requires\n            a device index. If you create a launch template that includes secondary network interfaces \n            but not a primary network interface, then you must add a primary network interface as a \n            launch parameter when you launch an instance from the template.</p>"
           }
         },
         "Groups": {
@@ -104748,7 +104748,7 @@
           "target": "com.amazonaws.ec2#VolumeAttachmentList",
           "traits": {
             "aws.protocols#ec2QueryName": "AttachmentSet",
-            "smithy.api#documentation": "<p>Information about the volume attachments.</p>",
+            "smithy.api#documentation": "<note>\n            <p>This parameter is not returned by CreateVolume.</p>\n         </note>\n         <p>Information about the volume attachments.</p>",
             "smithy.api#xmlName": "attachmentSet"
           }
         },
@@ -104852,7 +104852,7 @@
           "target": "com.amazonaws.ec2#Boolean",
           "traits": {
             "aws.protocols#ec2QueryName": "FastRestored",
-            "smithy.api#documentation": "<p>Indicates whether the volume was created using fast snapshot restore.</p>",
+            "smithy.api#documentation": "<note>\n            <p>This parameter is not returned by CreateVolume.</p>\n         </note>\n         <p>Indicates whether the volume was created using fast snapshot restore.</p>",
             "smithy.api#xmlName": "fastRestored"
           }
         },
@@ -104876,7 +104876,7 @@
           "target": "com.amazonaws.ec2#SSEType",
           "traits": {
             "aws.protocols#ec2QueryName": "SseType",
-            "smithy.api#documentation": "<p>Reserved for future use.</p>",
+            "smithy.api#documentation": "<note>\n            <p>This parameter is not returned by CreateVolume.</p>\n         </note>\n         <p>Reserved for future use.</p>",
             "smithy.api#xmlName": "sseType"
           }
         }