diff --git a/discovery/vpcaccess-v1.json b/discovery/vpcaccess-v1.json
index 235dcce6cc..041aaa4484 100644
--- a/discovery/vpcaccess-v1.json
+++ b/discovery/vpcaccess-v1.json
@@ -384,7 +384,7 @@
       }
     }
   },
-  "revision": "20231214",
+  "revision": "20240905",
   "rootUrl": "https://vpcaccess.googleapis.com/",
   "schemas": {
     "Connector": {
@@ -400,7 +400,7 @@
           "type": "array"
         },
         "ipCidrRange": {
-          "description": "The range of internal addresses that follows RFC 4632 notation. Example: `10.132.0.0/28`.",
+          "description": "Optional. The range of internal addresses that follows RFC 4632 notation. Example: `10.132.0.0/28`.",
           "type": "string"
         },
         "machineType": {
@@ -413,6 +413,7 @@
           "type": "integer"
         },
         "maxThroughput": {
+          "deprecated": true,
           "description": "Maximum throughput of the connector in Mbps. Refers to the expected throughput when using an `e2-micro` machine type. Value must be a multiple of 100 from 300 through 1000. Must be higher than the value specified by --min-throughput. If both max-throughput and max-instances are provided, max-instances takes precedence over max-throughput. The use of `max-throughput` is discouraged in favor of `max-instances`.",
           "format": "int32",
           "type": "integer"
@@ -423,6 +424,7 @@
           "type": "integer"
         },
         "minThroughput": {
+          "deprecated": true,
           "description": "Minimum throughput of the connector in Mbps. Refers to the expected throughput when using an `e2-micro` machine type. Value must be a multiple of 100 from 200 through 900. Must be lower than the value specified by --max-throughput. If both min-throughput and min-instances are provided, min-instances takes precedence over min-throughput. The use of `min-throughput` is discouraged in favor of `min-instances`.",
           "format": "int32",
           "type": "integer"
@@ -432,7 +434,7 @@
           "type": "string"
         },
         "network": {
-          "description": "Name of a VPC network.",
+          "description": "Optional. Name of a VPC network.",
           "type": "string"
         },
         "state": {
@@ -458,7 +460,7 @@
         },
         "subnet": {
           "$ref": "Subnet",
-          "description": "The subnet in which to house the VPC Access Connector."
+          "description": "Optional. The subnet in which to house the VPC Access Connector."
         }
       },
       "type": "object"
@@ -705,11 +707,11 @@
       "id": "Subnet",
       "properties": {
         "name": {
-          "description": "Subnet name (relative, not fully qualified). E.g. if the full subnet selfLink is https://compute.googleapis.com/compute/v1/projects/{project}/regions/{region}/subnetworks/{subnetName} the correct input for this field would be {subnetName}",
+          "description": "Optional. Subnet name (relative, not fully qualified). E.g. if the full subnet selfLink is https://compute.googleapis.com/compute/v1/projects/{project}/regions/{region}/subnetworks/{subnetName} the correct input for this field would be {subnetName}",
           "type": "string"
         },
         "projectId": {
-          "description": "Project in which the subnet exists. If not set, this project is assumed to be the project for which the connector create request was issued.",
+          "description": "Optional. Project in which the subnet exists. If not set, this project is assumed to be the project for which the connector create request was issued.",
           "type": "string"
         }
       },
diff --git a/discovery/vpcaccess-v1beta1.json b/discovery/vpcaccess-v1beta1.json
index 59c73398be..257ea036fc 100644
--- a/discovery/vpcaccess-v1beta1.json
+++ b/discovery/vpcaccess-v1beta1.json
@@ -384,7 +384,7 @@
       }
     }
   },
-  "revision": "20231214",
+  "revision": "20240905",
   "rootUrl": "https://vpcaccess.googleapis.com/",
   "schemas": {
     "Connector": {
@@ -406,7 +406,7 @@
           "type": "string"
         },
         "ipCidrRange": {
-          "description": "The range of internal addresses that follows RFC 4632 notation. Example: `10.132.0.0/28`.",
+          "description": "Optional. The range of internal addresses that follows RFC 4632 notation. Example: `10.132.0.0/28`.",
           "type": "string"
         },
         "lastRestartTime": {
@@ -425,6 +425,7 @@
           "type": "integer"
         },
         "maxThroughput": {
+          "deprecated": true,
           "description": "Maximum throughput of the connector in Mbps. Refers to the expected throughput when using an `e2-micro` machine type. Value must be a multiple of 100 from 300 through 1000. Must be higher than the value specified by --min-throughput. If both max-throughput and max-instances are provided, max-instances takes precedence over max-throughput. The use of `max-throughput` is discouraged in favor of `max-instances`.",
           "format": "int32",
           "type": "integer"
@@ -435,6 +436,7 @@
           "type": "integer"
         },
         "minThroughput": {
+          "deprecated": true,
           "description": "Minimum throughput of the connector in Mbps. Refers to the expected throughput when using an `e2-micro` machine type. Value must be a multiple of 100 from 200 through 900. Must be lower than the value specified by --max-throughput. If both min-throughput and min-instances are provided, min-instances takes precedence over min-throughput. The use of `min-throughput` is discouraged in favor of `min-instances`.",
           "format": "int32",
           "type": "integer"
@@ -444,7 +446,7 @@
           "type": "string"
         },
         "network": {
-          "description": "Name of a VPC network.",
+          "description": "Optional. Name of a VPC network.",
           "type": "string"
         },
         "state": {
@@ -470,7 +472,7 @@
         },
         "subnet": {
           "$ref": "Subnet",
-          "description": "The subnet in which to house the VPC Access Connector."
+          "description": "Optional. The subnet in which to house the VPC Access Connector."
         }
       },
       "type": "object"
@@ -717,11 +719,11 @@
       "id": "Subnet",
       "properties": {
         "name": {
-          "description": "Subnet name (relative, not fully qualified). E.g. if the full subnet selfLink is https://compute.googleapis.com/compute/v1/projects/{project}/regions/{region}/subnetworks/{subnetName} the correct input for this field would be {subnetName}",
+          "description": "Optional. Subnet name (relative, not fully qualified). E.g. if the full subnet selfLink is https://compute.googleapis.com/compute/v1/projects/{project}/regions/{region}/subnetworks/{subnetName} the correct input for this field would be {subnetName}",
           "type": "string"
         },
         "projectId": {
-          "description": "Project in which the subnet exists. If not set, this project is assumed to be the project for which the connector create request was issued.",
+          "description": "Optional. Project in which the subnet exists. If not set, this project is assumed to be the project for which the connector create request was issued.",
           "type": "string"
         }
       },
diff --git a/src/apis/vpcaccess/v1.ts b/src/apis/vpcaccess/v1.ts
index 6707b607b7..9ef77d89b9 100644
--- a/src/apis/vpcaccess/v1.ts
+++ b/src/apis/vpcaccess/v1.ts
@@ -133,7 +133,7 @@ export namespace vpcaccess_v1 {
      */
     connectedProjects?: string[] | null;
     /**
-     * The range of internal addresses that follows RFC 4632 notation. Example: `10.132.0.0/28`.
+     * Optional. The range of internal addresses that follows RFC 4632 notation. Example: `10.132.0.0/28`.
      */
     ipCidrRange?: string | null;
     /**
@@ -161,7 +161,7 @@ export namespace vpcaccess_v1 {
      */
     name?: string | null;
     /**
-     * Name of a VPC network.
+     * Optional. Name of a VPC network.
      */
     network?: string | null;
     /**
@@ -169,7 +169,7 @@ export namespace vpcaccess_v1 {
      */
     state?: string | null;
     /**
-     * The subnet in which to house the VPC Access Connector.
+     * Optional. The subnet in which to house the VPC Access Connector.
      */
     subnet?: Schema$Subnet;
   }
@@ -347,11 +347,11 @@ export namespace vpcaccess_v1 {
    */
   export interface Schema$Subnet {
     /**
-     * Subnet name (relative, not fully qualified). E.g. if the full subnet selfLink is https://compute.googleapis.com/compute/v1/projects/{project\}/regions/{region\}/subnetworks/{subnetName\} the correct input for this field would be {subnetName\}
+     * Optional. Subnet name (relative, not fully qualified). E.g. if the full subnet selfLink is https://compute.googleapis.com/compute/v1/projects/{project\}/regions/{region\}/subnetworks/{subnetName\} the correct input for this field would be {subnetName\}
      */
     name?: string | null;
     /**
-     * Project in which the subnet exists. If not set, this project is assumed to be the project for which the connector create request was issued.
+     * Optional. Project in which the subnet exists. If not set, this project is assumed to be the project for which the connector create request was issued.
      */
     projectId?: string | null;
   }
diff --git a/src/apis/vpcaccess/v1beta1.ts b/src/apis/vpcaccess/v1beta1.ts
index 62f99a5c09..a1df1632bb 100644
--- a/src/apis/vpcaccess/v1beta1.ts
+++ b/src/apis/vpcaccess/v1beta1.ts
@@ -137,7 +137,7 @@ export namespace vpcaccess_v1beta1 {
      */
     createTime?: string | null;
     /**
-     * The range of internal addresses that follows RFC 4632 notation. Example: `10.132.0.0/28`.
+     * Optional. The range of internal addresses that follows RFC 4632 notation. Example: `10.132.0.0/28`.
      */
     ipCidrRange?: string | null;
     /**
@@ -169,7 +169,7 @@ export namespace vpcaccess_v1beta1 {
      */
     name?: string | null;
     /**
-     * Name of a VPC network.
+     * Optional. Name of a VPC network.
      */
     network?: string | null;
     /**
@@ -177,7 +177,7 @@ export namespace vpcaccess_v1beta1 {
      */
     state?: string | null;
     /**
-     * The subnet in which to house the VPC Access Connector.
+     * Optional. The subnet in which to house the VPC Access Connector.
      */
     subnet?: Schema$Subnet;
   }
@@ -355,11 +355,11 @@ export namespace vpcaccess_v1beta1 {
    */
   export interface Schema$Subnet {
     /**
-     * Subnet name (relative, not fully qualified). E.g. if the full subnet selfLink is https://compute.googleapis.com/compute/v1/projects/{project\}/regions/{region\}/subnetworks/{subnetName\} the correct input for this field would be {subnetName\}
+     * Optional. Subnet name (relative, not fully qualified). E.g. if the full subnet selfLink is https://compute.googleapis.com/compute/v1/projects/{project\}/regions/{region\}/subnetworks/{subnetName\} the correct input for this field would be {subnetName\}
      */
     name?: string | null;
     /**
-     * Project in which the subnet exists. If not set, this project is assumed to be the project for which the connector create request was issued.
+     * Optional. Project in which the subnet exists. If not set, this project is assumed to be the project for which the connector create request was issued.
      */
     projectId?: string | null;
   }