diff --git a/SecurityCenterManagement/src/V1/UpdateSecurityCenterServiceRequest.php b/SecurityCenterManagement/src/V1/UpdateSecurityCenterServiceRequest.php
index 1a92796d7465..9f8693b99a17 100644
--- a/SecurityCenterManagement/src/V1/UpdateSecurityCenterServiceRequest.php
+++ b/SecurityCenterManagement/src/V1/UpdateSecurityCenterServiceRequest.php
@@ -30,13 +30,13 @@ class UpdateSecurityCenterServiceRequest extends \Google\Protobuf\Internal\Messa
      */
     protected $update_mask = null;
     /**
-     * Optional. When set to true, only validations (including IAM checks) will
+     * Optional. When set to true, only validations (including IAM checks) will be
      * done for the request (service will not be updated). An OK response
-     * indicates the request is valid while an error response indicates the
-     * request is invalid. Note that a subsequent request to actually update the
-     * service could still fail because 1. the state could have changed (e.g. IAM
-     * permission lost) or
-     * 2. A failure occurred while trying to delete the module.
+     * indicates that the request is valid, while an error response indicates that
+     * the request is invalid. Note that a subsequent request to actually update
+     * the service could still fail for one of the following reasons:
+     * - The state could have changed (e.g. IAM permission lost).
+     * - A failure occurred while trying to delete the module.
      *
      * Generated from protobuf field <code>bool validate_only = 3 [(.google.api.field_behavior) = OPTIONAL];</code>
      */
@@ -73,13 +73,13 @@ public static function build(\Google\Cloud\SecurityCenterManagement\V1\SecurityC
      *             * "intended_enablement_state"
      *             * "modules"
      *     @type bool $validate_only
-     *           Optional. When set to true, only validations (including IAM checks) will
+     *           Optional. When set to true, only validations (including IAM checks) will be
      *           done for the request (service will not be updated). An OK response
-     *           indicates the request is valid while an error response indicates the
-     *           request is invalid. Note that a subsequent request to actually update the
-     *           service could still fail because 1. the state could have changed (e.g. IAM
-     *           permission lost) or
-     *           2. A failure occurred while trying to delete the module.
+     *           indicates that the request is valid, while an error response indicates that
+     *           the request is invalid. Note that a subsequent request to actually update
+     *           the service could still fail for one of the following reasons:
+     *           - The state could have changed (e.g. IAM permission lost).
+     *           - A failure occurred while trying to delete the module.
      * }
      */
     public function __construct($data = NULL) {
@@ -164,13 +164,13 @@ public function setUpdateMask($var)
     }
 
     /**
-     * Optional. When set to true, only validations (including IAM checks) will
+     * Optional. When set to true, only validations (including IAM checks) will be
      * done for the request (service will not be updated). An OK response
-     * indicates the request is valid while an error response indicates the
-     * request is invalid. Note that a subsequent request to actually update the
-     * service could still fail because 1. the state could have changed (e.g. IAM
-     * permission lost) or
-     * 2. A failure occurred while trying to delete the module.
+     * indicates that the request is valid, while an error response indicates that
+     * the request is invalid. Note that a subsequent request to actually update
+     * the service could still fail for one of the following reasons:
+     * - The state could have changed (e.g. IAM permission lost).
+     * - A failure occurred while trying to delete the module.
      *
      * Generated from protobuf field <code>bool validate_only = 3 [(.google.api.field_behavior) = OPTIONAL];</code>
      * @return bool
@@ -181,13 +181,13 @@ public function getValidateOnly()
     }
 
     /**
-     * Optional. When set to true, only validations (including IAM checks) will
+     * Optional. When set to true, only validations (including IAM checks) will be
      * done for the request (service will not be updated). An OK response
-     * indicates the request is valid while an error response indicates the
-     * request is invalid. Note that a subsequent request to actually update the
-     * service could still fail because 1. the state could have changed (e.g. IAM
-     * permission lost) or
-     * 2. A failure occurred while trying to delete the module.
+     * indicates that the request is valid, while an error response indicates that
+     * the request is invalid. Note that a subsequent request to actually update
+     * the service could still fail for one of the following reasons:
+     * - The state could have changed (e.g. IAM permission lost).
+     * - A failure occurred while trying to delete the module.
      *
      * Generated from protobuf field <code>bool validate_only = 3 [(.google.api.field_behavior) = OPTIONAL];</code>
      * @param bool $var