diff --git a/discovery/servicenetworking-v1.json b/discovery/servicenetworking-v1.json
index 901cb58041c..74fc6fb19c0 100644
--- a/discovery/servicenetworking-v1.json
+++ b/discovery/servicenetworking-v1.json
@@ -677,7 +677,7 @@
       }
     }
   },
-  "revision": "20200606",
+  "revision": "20200609",
   "rootUrl": "https://servicenetworking.googleapis.com/",
   "schemas": {
     "AddDnsRecordSetMetadata": {
@@ -1847,7 +1847,7 @@
       "type": "object"
     },
     "MetricDescriptor": {
-      "description": "Defines a metric type and its schema. Once a metric descriptor is created,\ndeleting or altering it stops data collection and makes the metric type's\nexisting data unusable.",
+      "description": "Defines a metric type and its schema. Once a metric descriptor is created,\ndeleting or altering it stops data collection and makes the metric type's\nexisting data unusable.\n\nThe following are specific rules for service defined Monitoring metric\ndescriptors:\n\n* `type`, `metric_kind`, `value_type`, `description`, `display_name`,\n  `launch_stage` fields are all required. The `unit` field must be specified\n  if the `value_type` is any of DOUBLE, INT64, DISTRIBUTION.\n* Maximum of default 500 metric descriptors per service is allowed.\n* Maximum of default 10 labels per metric descriptor is allowed.\n\nThe default maximum limit can be overridden. Please follow\nhttps://cloud.google.com/monitoring/quotas",
       "id": "MetricDescriptor",
       "properties": {
         "description": {
@@ -1859,7 +1859,7 @@
           "type": "string"
         },
         "labels": {
-          "description": "The set of labels that can be used to describe a specific\ninstance of this metric type. For example, the\n`appengine.googleapis.com/http/server/response_latencies` metric\ntype has a label for the HTTP response code, `response_code`, so\nyou can look at latencies for successful responses or just\nfor responses that failed.",
+          "description": "The set of labels that can be used to describe a specific\ninstance of this metric type.\n\nThe label key name must follow:\n\n* Only upper and lower-case letters, digits and underscores (_) are\n  allowed.\n* Label name must start with a letter or digit.\n* The maximum length of a label name is 100 characters.\n\nFor example, the\n`appengine.googleapis.com/http/server/response_latencies` metric\ntype has a label for the HTTP response code, `response_code`, so\nyou can look at latencies for successful responses or just\nfor responses that failed.",
           "items": {
             "$ref": "LabelDescriptor"
           },
@@ -1921,7 +1921,7 @@
           "type": "string"
         },
         "type": {
-          "description": "The metric type, including its DNS name prefix. The type is not\nURL-encoded.  All user-defined metric types have the DNS name\n`custom.googleapis.com` or `external.googleapis.com`.  Metric types should\nuse a natural hierarchical grouping. For example:\n\n    \"custom.googleapis.com/invoice/paid/amount\"\n    \"external.googleapis.com/prometheus/up\"\n    \"appengine.googleapis.com/http/server/response_latencies\"",
+          "description": "The metric type, including its DNS name prefix. The type is not\nURL-encoded.\n\nAll service defined metrics must be prefixed with the service name, in the\nformat of `{service name}/{relative metric name}`, such as\n`cloudsql.googleapis.com/database/cpu/utilization`. The relative metric\nname must follow:\n\n* Only upper and lower-case letters, digits, '/' and underscores '_' are\n  allowed.\n* The maximum number of characters allowed for the relative_metric_name is\n  100.\n\nAll user-defined metric types have the DNS name\n`custom.googleapis.com`, `external.googleapis.com`, or\n`logging.googleapis.com/user/`.\n\nMetric types should use a natural hierarchical grouping. For example:\n\n    \"custom.googleapis.com/invoice/paid/amount\"\n    \"external.googleapis.com/prometheus/up\"\n    \"appengine.googleapis.com/http/server/response_latencies\"",
           "type": "string"
         },
         "unit": {
@@ -2029,7 +2029,7 @@
       "type": "object"
     },
     "MonitoredResourceDescriptor": {
-      "description": "An object that describes the schema of a MonitoredResource object using a\ntype name and a set of labels.  For example, the monitored resource\ndescriptor for Google Compute Engine VM instances has a type of\n`\"gce_instance\"` and specifies the use of the labels `\"instance_id\"` and\n`\"zone\"` to identify particular VM instances.\n\nDifferent APIs can support different monitored resource types. APIs generally\nprovide a `list` method that returns the monitored resource descriptors used\nby the API.",
+      "description": "An object that describes the schema of a MonitoredResource object using a\ntype name and a set of labels.  For example, the monitored resource\ndescriptor for Google Compute Engine VM instances has a type of\n`\"gce_instance\"` and specifies the use of the labels `\"instance_id\"` and\n`\"zone\"` to identify particular VM instances.\n\nDifferent services can support different monitored resource types.\n\nThe following are specific rules to service defined monitored resources for\nMonitoring and Logging:\n\n* The `type`, `display_name`, `description`, `labels` and `launch_stage`\n  fields are all required.\n* The first label of the monitored resource descriptor must be\n  `resource_container`. There are legacy monitored resource descritptors\n  start with `project_id`.\n* It must include a `location` label. * Maximum of default 5 service defined monitored resource descriptors\n  is allowed per service.\n* Maximum of default 10 labels per monitored resource is allowed.\n\nThe default maximum limit can be overridden. Please follow\nhttps://cloud.google.com/monitoring/quotas",
       "id": "MonitoredResourceDescriptor",
       "properties": {
         "description": {
@@ -2041,7 +2041,7 @@
           "type": "string"
         },
         "labels": {
-          "description": "Required. A set of labels used to describe instances of this monitored\nresource type. For example, an individual Google Cloud SQL database is\nidentified by values for the labels `\"database_id\"` and `\"zone\"`.",
+          "description": "Required. A set of labels used to describe instances of this monitored\nresource type.\nThe label key name must follow:\n\n* Only upper and lower-case letters, digits and underscores (_) are\n  allowed.\n* Label name must start with a letter or digit.\n* The maximum length of a label name is 100 characters.\n\nFor example, an individual Google Cloud SQL database is\nidentified by values for the labels `database_id` and `location`.",
           "items": {
             "$ref": "LabelDescriptor"
           },
@@ -2076,7 +2076,7 @@
           "type": "string"
         },
         "type": {
-          "description": "Required. The monitored resource type. For example, the type\n`\"cloudsql_database\"` represents databases in Google Cloud SQL.\nThe maximum length of this value is 256 characters.",
+          "description": "Note there are legacy service monitored resources not following this rule.",
           "type": "string"
         }
       },
diff --git a/discovery/servicenetworking-v1beta.json b/discovery/servicenetworking-v1beta.json
index e8c03d25e82..fd507f466c8 100644
--- a/discovery/servicenetworking-v1beta.json
+++ b/discovery/servicenetworking-v1beta.json
@@ -307,7 +307,7 @@
       }
     }
   },
-  "revision": "20200606",
+  "revision": "20200609",
   "rootUrl": "https://servicenetworking.googleapis.com/",
   "schemas": {
     "AddDnsRecordSetMetadata": {
@@ -1353,7 +1353,7 @@
       "type": "object"
     },
     "MetricDescriptor": {
-      "description": "Defines a metric type and its schema. Once a metric descriptor is created,\ndeleting or altering it stops data collection and makes the metric type's\nexisting data unusable.",
+      "description": "Defines a metric type and its schema. Once a metric descriptor is created,\ndeleting or altering it stops data collection and makes the metric type's\nexisting data unusable.\n\nThe following are specific rules for service defined Monitoring metric\ndescriptors:\n\n* `type`, `metric_kind`, `value_type`, `description`, `display_name`,\n  `launch_stage` fields are all required. The `unit` field must be specified\n  if the `value_type` is any of DOUBLE, INT64, DISTRIBUTION.\n* Maximum of default 500 metric descriptors per service is allowed.\n* Maximum of default 10 labels per metric descriptor is allowed.\n\nThe default maximum limit can be overridden. Please follow\nhttps://cloud.google.com/monitoring/quotas",
       "id": "MetricDescriptor",
       "properties": {
         "description": {
@@ -1365,7 +1365,7 @@
           "type": "string"
         },
         "labels": {
-          "description": "The set of labels that can be used to describe a specific\ninstance of this metric type. For example, the\n`appengine.googleapis.com/http/server/response_latencies` metric\ntype has a label for the HTTP response code, `response_code`, so\nyou can look at latencies for successful responses or just\nfor responses that failed.",
+          "description": "The set of labels that can be used to describe a specific\ninstance of this metric type.\n\nThe label key name must follow:\n\n* Only upper and lower-case letters, digits and underscores (_) are\n  allowed.\n* Label name must start with a letter or digit.\n* The maximum length of a label name is 100 characters.\n\nFor example, the\n`appengine.googleapis.com/http/server/response_latencies` metric\ntype has a label for the HTTP response code, `response_code`, so\nyou can look at latencies for successful responses or just\nfor responses that failed.",
           "items": {
             "$ref": "LabelDescriptor"
           },
@@ -1427,7 +1427,7 @@
           "type": "string"
         },
         "type": {
-          "description": "The metric type, including its DNS name prefix. The type is not\nURL-encoded.  All user-defined metric types have the DNS name\n`custom.googleapis.com` or `external.googleapis.com`.  Metric types should\nuse a natural hierarchical grouping. For example:\n\n    \"custom.googleapis.com/invoice/paid/amount\"\n    \"external.googleapis.com/prometheus/up\"\n    \"appengine.googleapis.com/http/server/response_latencies\"",
+          "description": "The metric type, including its DNS name prefix. The type is not\nURL-encoded.\n\nAll service defined metrics must be prefixed with the service name, in the\nformat of `{service name}/{relative metric name}`, such as\n`cloudsql.googleapis.com/database/cpu/utilization`. The relative metric\nname must follow:\n\n* Only upper and lower-case letters, digits, '/' and underscores '_' are\n  allowed.\n* The maximum number of characters allowed for the relative_metric_name is\n  100.\n\nAll user-defined metric types have the DNS name\n`custom.googleapis.com`, `external.googleapis.com`, or\n`logging.googleapis.com/user/`.\n\nMetric types should use a natural hierarchical grouping. For example:\n\n    \"custom.googleapis.com/invoice/paid/amount\"\n    \"external.googleapis.com/prometheus/up\"\n    \"appengine.googleapis.com/http/server/response_latencies\"",
           "type": "string"
         },
         "unit": {
@@ -1535,7 +1535,7 @@
       "type": "object"
     },
     "MonitoredResourceDescriptor": {
-      "description": "An object that describes the schema of a MonitoredResource object using a\ntype name and a set of labels.  For example, the monitored resource\ndescriptor for Google Compute Engine VM instances has a type of\n`\"gce_instance\"` and specifies the use of the labels `\"instance_id\"` and\n`\"zone\"` to identify particular VM instances.\n\nDifferent APIs can support different monitored resource types. APIs generally\nprovide a `list` method that returns the monitored resource descriptors used\nby the API.",
+      "description": "An object that describes the schema of a MonitoredResource object using a\ntype name and a set of labels.  For example, the monitored resource\ndescriptor for Google Compute Engine VM instances has a type of\n`\"gce_instance\"` and specifies the use of the labels `\"instance_id\"` and\n`\"zone\"` to identify particular VM instances.\n\nDifferent services can support different monitored resource types.\n\nThe following are specific rules to service defined monitored resources for\nMonitoring and Logging:\n\n* The `type`, `display_name`, `description`, `labels` and `launch_stage`\n  fields are all required.\n* The first label of the monitored resource descriptor must be\n  `resource_container`. There are legacy monitored resource descritptors\n  start with `project_id`.\n* It must include a `location` label. * Maximum of default 5 service defined monitored resource descriptors\n  is allowed per service.\n* Maximum of default 10 labels per monitored resource is allowed.\n\nThe default maximum limit can be overridden. Please follow\nhttps://cloud.google.com/monitoring/quotas",
       "id": "MonitoredResourceDescriptor",
       "properties": {
         "description": {
@@ -1547,7 +1547,7 @@
           "type": "string"
         },
         "labels": {
-          "description": "Required. A set of labels used to describe instances of this monitored\nresource type. For example, an individual Google Cloud SQL database is\nidentified by values for the labels `\"database_id\"` and `\"zone\"`.",
+          "description": "Required. A set of labels used to describe instances of this monitored\nresource type.\nThe label key name must follow:\n\n* Only upper and lower-case letters, digits and underscores (_) are\n  allowed.\n* Label name must start with a letter or digit.\n* The maximum length of a label name is 100 characters.\n\nFor example, an individual Google Cloud SQL database is\nidentified by values for the labels `database_id` and `location`.",
           "items": {
             "$ref": "LabelDescriptor"
           },
@@ -1582,7 +1582,7 @@
           "type": "string"
         },
         "type": {
-          "description": "Required. The monitored resource type. For example, the type\n`\"cloudsql_database\"` represents databases in Google Cloud SQL.\nThe maximum length of this value is 256 characters.",
+          "description": "Note there are legacy service monitored resources not following this rule.",
           "type": "string"
         }
       },
diff --git a/src/apis/servicenetworking/v1.ts b/src/apis/servicenetworking/v1.ts
index d07219c731b..84499e0ed27 100644
--- a/src/apis/servicenetworking/v1.ts
+++ b/src/apis/servicenetworking/v1.ts
@@ -975,7 +975,7 @@ export namespace servicenetworking_v1 {
     syntax?: string | null;
   }
   /**
-   * Defines a metric type and its schema. Once a metric descriptor is created, deleting or altering it stops data collection and makes the metric type's existing data unusable.
+   * Defines a metric type and its schema. Once a metric descriptor is created, deleting or altering it stops data collection and makes the metric type's existing data unusable.  The following are specific rules for service defined Monitoring metric descriptors:  * `type`, `metric_kind`, `value_type`, `description`, `display_name`,   `launch_stage` fields are all required. The `unit` field must be specified   if the `value_type` is any of DOUBLE, INT64, DISTRIBUTION. * Maximum of default 500 metric descriptors per service is allowed. * Maximum of default 10 labels per metric descriptor is allowed.  The default maximum limit can be overridden. Please follow https://cloud.google.com/monitoring/quotas
    */
   export interface Schema$MetricDescriptor {
     /**
@@ -987,7 +987,7 @@ export namespace servicenetworking_v1 {
      */
     displayName?: string | null;
     /**
-     * The set of labels that can be used to describe a specific instance of this metric type. For example, the `appengine.googleapis.com/http/server/response_latencies` metric type has a label for the HTTP response code, `response_code`, so you can look at latencies for successful responses or just for responses that failed.
+     * The set of labels that can be used to describe a specific instance of this metric type.  The label key name must follow:  * Only upper and lower-case letters, digits and underscores (_) are   allowed. * Label name must start with a letter or digit. * The maximum length of a label name is 100 characters.  For example, the `appengine.googleapis.com/http/server/response_latencies` metric type has a label for the HTTP response code, `response_code`, so you can look at latencies for successful responses or just for responses that failed.
      */
     labels?: Schema$LabelDescriptor[];
     /**
@@ -1011,7 +1011,7 @@ export namespace servicenetworking_v1 {
      */
     name?: string | null;
     /**
-     * The metric type, including its DNS name prefix. The type is not URL-encoded.  All user-defined metric types have the DNS name `custom.googleapis.com` or `external.googleapis.com`.  Metric types should use a natural hierarchical grouping. For example:      "custom.googleapis.com/invoice/paid/amount"     "external.googleapis.com/prometheus/up"     "appengine.googleapis.com/http/server/response_latencies"
+     * The metric type, including its DNS name prefix. The type is not URL-encoded.  All service defined metrics must be prefixed with the service name, in the format of `{service name}/{relative metric name}`, such as `cloudsql.googleapis.com/database/cpu/utilization`. The relative metric name must follow:  * Only upper and lower-case letters, digits, '/' and underscores '_' are   allowed. * The maximum number of characters allowed for the relative_metric_name is   100.  All user-defined metric types have the DNS name `custom.googleapis.com`, `external.googleapis.com`, or `logging.googleapis.com/user/`.  Metric types should use a natural hierarchical grouping. For example:      "custom.googleapis.com/invoice/paid/amount"     "external.googleapis.com/prometheus/up"     "appengine.googleapis.com/http/server/response_latencies"
      */
     type?: string | null;
     /**
@@ -1067,7 +1067,7 @@ export namespace servicenetworking_v1 {
     root?: string | null;
   }
   /**
-   * An object that describes the schema of a MonitoredResource object using a type name and a set of labels.  For example, the monitored resource descriptor for Google Compute Engine VM instances has a type of `"gce_instance"` and specifies the use of the labels `"instance_id"` and `"zone"` to identify particular VM instances.  Different APIs can support different monitored resource types. APIs generally provide a `list` method that returns the monitored resource descriptors used by the API.
+   * An object that describes the schema of a MonitoredResource object using a type name and a set of labels.  For example, the monitored resource descriptor for Google Compute Engine VM instances has a type of `"gce_instance"` and specifies the use of the labels `"instance_id"` and `"zone"` to identify particular VM instances.  Different services can support different monitored resource types.  The following are specific rules to service defined monitored resources for Monitoring and Logging:  * The `type`, `display_name`, `description`, `labels` and `launch_stage`   fields are all required. * The first label of the monitored resource descriptor must be   `resource_container`. There are legacy monitored resource descritptors   start with `project_id`. * It must include a `location` label. * Maximum of default 5 service defined monitored resource descriptors   is allowed per service. * Maximum of default 10 labels per monitored resource is allowed.  The default maximum limit can be overridden. Please follow https://cloud.google.com/monitoring/quotas
    */
   export interface Schema$MonitoredResourceDescriptor {
     /**
@@ -1079,7 +1079,7 @@ export namespace servicenetworking_v1 {
      */
     displayName?: string | null;
     /**
-     * Required. A set of labels used to describe instances of this monitored resource type. For example, an individual Google Cloud SQL database is identified by values for the labels `"database_id"` and `"zone"`.
+     * Required. A set of labels used to describe instances of this monitored resource type. The label key name must follow:  * Only upper and lower-case letters, digits and underscores (_) are   allowed. * Label name must start with a letter or digit. * The maximum length of a label name is 100 characters.  For example, an individual Google Cloud SQL database is identified by values for the labels `database_id` and `location`.
      */
     labels?: Schema$LabelDescriptor[];
     /**
@@ -1091,7 +1091,7 @@ export namespace servicenetworking_v1 {
      */
     name?: string | null;
     /**
-     * Required. The monitored resource type. For example, the type `"cloudsql_database"` represents databases in Google Cloud SQL. The maximum length of this value is 256 characters.
+     * Note there are legacy service monitored resources not following this rule.
      */
     type?: string | null;
   }
diff --git a/src/apis/servicenetworking/v1beta.ts b/src/apis/servicenetworking/v1beta.ts
index 62549176401..36ef423f214 100644
--- a/src/apis/servicenetworking/v1beta.ts
+++ b/src/apis/servicenetworking/v1beta.ts
@@ -876,7 +876,7 @@ export namespace servicenetworking_v1beta {
     syntax?: string | null;
   }
   /**
-   * Defines a metric type and its schema. Once a metric descriptor is created, deleting or altering it stops data collection and makes the metric type's existing data unusable.
+   * Defines a metric type and its schema. Once a metric descriptor is created, deleting or altering it stops data collection and makes the metric type's existing data unusable.  The following are specific rules for service defined Monitoring metric descriptors:  * `type`, `metric_kind`, `value_type`, `description`, `display_name`,   `launch_stage` fields are all required. The `unit` field must be specified   if the `value_type` is any of DOUBLE, INT64, DISTRIBUTION. * Maximum of default 500 metric descriptors per service is allowed. * Maximum of default 10 labels per metric descriptor is allowed.  The default maximum limit can be overridden. Please follow https://cloud.google.com/monitoring/quotas
    */
   export interface Schema$MetricDescriptor {
     /**
@@ -888,7 +888,7 @@ export namespace servicenetworking_v1beta {
      */
     displayName?: string | null;
     /**
-     * The set of labels that can be used to describe a specific instance of this metric type. For example, the `appengine.googleapis.com/http/server/response_latencies` metric type has a label for the HTTP response code, `response_code`, so you can look at latencies for successful responses or just for responses that failed.
+     * The set of labels that can be used to describe a specific instance of this metric type.  The label key name must follow:  * Only upper and lower-case letters, digits and underscores (_) are   allowed. * Label name must start with a letter or digit. * The maximum length of a label name is 100 characters.  For example, the `appengine.googleapis.com/http/server/response_latencies` metric type has a label for the HTTP response code, `response_code`, so you can look at latencies for successful responses or just for responses that failed.
      */
     labels?: Schema$LabelDescriptor[];
     /**
@@ -912,7 +912,7 @@ export namespace servicenetworking_v1beta {
      */
     name?: string | null;
     /**
-     * The metric type, including its DNS name prefix. The type is not URL-encoded.  All user-defined metric types have the DNS name `custom.googleapis.com` or `external.googleapis.com`.  Metric types should use a natural hierarchical grouping. For example:      "custom.googleapis.com/invoice/paid/amount"     "external.googleapis.com/prometheus/up"     "appengine.googleapis.com/http/server/response_latencies"
+     * The metric type, including its DNS name prefix. The type is not URL-encoded.  All service defined metrics must be prefixed with the service name, in the format of `{service name}/{relative metric name}`, such as `cloudsql.googleapis.com/database/cpu/utilization`. The relative metric name must follow:  * Only upper and lower-case letters, digits, '/' and underscores '_' are   allowed. * The maximum number of characters allowed for the relative_metric_name is   100.  All user-defined metric types have the DNS name `custom.googleapis.com`, `external.googleapis.com`, or `logging.googleapis.com/user/`.  Metric types should use a natural hierarchical grouping. For example:      "custom.googleapis.com/invoice/paid/amount"     "external.googleapis.com/prometheus/up"     "appengine.googleapis.com/http/server/response_latencies"
      */
     type?: string | null;
     /**
@@ -968,7 +968,7 @@ export namespace servicenetworking_v1beta {
     root?: string | null;
   }
   /**
-   * An object that describes the schema of a MonitoredResource object using a type name and a set of labels.  For example, the monitored resource descriptor for Google Compute Engine VM instances has a type of `"gce_instance"` and specifies the use of the labels `"instance_id"` and `"zone"` to identify particular VM instances.  Different APIs can support different monitored resource types. APIs generally provide a `list` method that returns the monitored resource descriptors used by the API.
+   * An object that describes the schema of a MonitoredResource object using a type name and a set of labels.  For example, the monitored resource descriptor for Google Compute Engine VM instances has a type of `"gce_instance"` and specifies the use of the labels `"instance_id"` and `"zone"` to identify particular VM instances.  Different services can support different monitored resource types.  The following are specific rules to service defined monitored resources for Monitoring and Logging:  * The `type`, `display_name`, `description`, `labels` and `launch_stage`   fields are all required. * The first label of the monitored resource descriptor must be   `resource_container`. There are legacy monitored resource descritptors   start with `project_id`. * It must include a `location` label. * Maximum of default 5 service defined monitored resource descriptors   is allowed per service. * Maximum of default 10 labels per monitored resource is allowed.  The default maximum limit can be overridden. Please follow https://cloud.google.com/monitoring/quotas
    */
   export interface Schema$MonitoredResourceDescriptor {
     /**
@@ -980,7 +980,7 @@ export namespace servicenetworking_v1beta {
      */
     displayName?: string | null;
     /**
-     * Required. A set of labels used to describe instances of this monitored resource type. For example, an individual Google Cloud SQL database is identified by values for the labels `"database_id"` and `"zone"`.
+     * Required. A set of labels used to describe instances of this monitored resource type. The label key name must follow:  * Only upper and lower-case letters, digits and underscores (_) are   allowed. * Label name must start with a letter or digit. * The maximum length of a label name is 100 characters.  For example, an individual Google Cloud SQL database is identified by values for the labels `database_id` and `location`.
      */
     labels?: Schema$LabelDescriptor[];
     /**
@@ -992,7 +992,7 @@ export namespace servicenetworking_v1beta {
      */
     name?: string | null;
     /**
-     * Required. The monitored resource type. For example, the type `"cloudsql_database"` represents databases in Google Cloud SQL. The maximum length of this value is 256 characters.
+     * Note there are legacy service monitored resources not following this rule.
      */
     type?: string | null;
   }