diff --git a/discovery/drive-v2.json b/discovery/drive-v2.json
index 957c92885b..020f004747 100644
--- a/discovery/drive-v2.json
+++ b/discovery/drive-v2.json
@@ -38,7 +38,7 @@
   "description": "Manages files in Drive including uploading, downloading, searching, detecting changes, and updating sharing permissions.",
   "discoveryVersion": "v1",
   "documentationLink": "https://developers.google.com/drive/",
-  "etag": "\"-2NioU2H8y8siEzrBOV_qzRI6kQ/GB_1RM82OKxTSfzeb_5bvCbmQ40\"",
+  "etag": "\"-2NioU2H8y8siEzrBOV_qzRI6kQ/6fuP5JDS7CDwzVsd3cAc59pg_GE\"",
   "icons": {
     "x16": "https://ssl.gstatic.com/docs/doclist/images/drive_icon_16.png",
     "x32": "https://ssl.gstatic.com/docs/doclist/images/drive_icon_32.png"
@@ -3521,7 +3521,7 @@
       }
     }
   },
-  "revision": "20200922",
+  "revision": "20201012",
   "rootUrl": "https://www.googleapis.com/",
   "schemas": {
     "About": {
@@ -5192,7 +5192,7 @@
           "type": "object"
         },
         "thumbnailLink": {
-          "description": "A short-lived link to the file's thumbnail. Typically lasts on the order of hours. Only populated when the requesting app can access the file's content.",
+          "description": "A short-lived link to the file's thumbnail. Typically lasts on the order of hours. Only populated when the requesting app can access the file's content. If the file isn't shared publicly, the URL returned in Files.thumbnailLink must be fetched using a credentialed request.",
           "type": "string"
         },
         "thumbnailVersion": {
@@ -5716,7 +5716,7 @@
           "type": "boolean"
         },
         "publishedLink": {
-          "description": "A link to the published revision.",
+          "description": "A link to the published revision. This is only populated for Google Sites files.",
           "type": "string"
         },
         "publishedOutsideDomain": {
diff --git a/discovery/drive-v3.json b/discovery/drive-v3.json
index 28e6d1f435..510207a4f3 100644
--- a/discovery/drive-v3.json
+++ b/discovery/drive-v3.json
@@ -35,7 +35,7 @@
   "description": "Manages files in Drive including uploading, downloading, searching, detecting changes, and updating sharing permissions.",
   "discoveryVersion": "v1",
   "documentationLink": "https://developers.google.com/drive/",
-  "etag": "\"-2NioU2H8y8siEzrBOV_qzRI6kQ/lYzeVghRp2AhwBoE0RMEl0_BZkA\"",
+  "etag": "\"-2NioU2H8y8siEzrBOV_qzRI6kQ/_4ojy4QxfvTPR9kgosczqy5b6UE\"",
   "icons": {
     "x16": "https://ssl.gstatic.com/docs/doclist/images/drive_icon_16.png",
     "x32": "https://ssl.gstatic.com/docs/doclist/images/drive_icon_32.png"
@@ -2185,7 +2185,7 @@
       }
     }
   },
-  "revision": "20200922",
+  "revision": "20201012",
   "rootUrl": "https://www.googleapis.com/",
   "schemas": {
     "About": {
@@ -3272,7 +3272,7 @@
           "type": "string"
         },
         "thumbnailLink": {
-          "description": "A short-lived link to the file's thumbnail, if available. Typically lasts on the order of hours. Only populated when the requesting app can access the file's content.",
+          "description": "A short-lived link to the file's thumbnail, if available. Typically lasts on the order of hours. Only populated when the requesting app can access the file's content. If the file isn't shared publicly, the URL returned in Files.thumbnailLink must be fetched using a credentialed request.",
           "type": "string"
         },
         "thumbnailVersion": {
@@ -3666,7 +3666,7 @@
           "type": "boolean"
         },
         "publishedLink": {
-          "description": "A link to the published revision.",
+          "description": "A link to the published revision. This is only populated for Google Sites files.",
           "type": "string"
         },
         "publishedOutsideDomain": {
diff --git a/src/apis/drive/v2.ts b/src/apis/drive/v2.ts
index ad15f21499..e153ca8e10 100644
--- a/src/apis/drive/v2.ts
+++ b/src/apis/drive/v2.ts
@@ -1164,7 +1164,7 @@ export namespace drive_v2 {
      */
     thumbnail?: {image?: string; mimeType?: string} | null;
     /**
-     * A short-lived link to the file's thumbnail. Typically lasts on the order of hours. Only populated when the requesting app can access the file's content.
+     * A short-lived link to the file's thumbnail. Typically lasts on the order of hours. Only populated when the requesting app can access the file's content. If the file isn't shared publicly, the URL returned in Files.thumbnailLink must be fetched using a credentialed request.
      */
     thumbnailLink?: string | null;
     /**
@@ -1551,7 +1551,7 @@ export namespace drive_v2 {
      */
     published?: boolean | null;
     /**
-     * A link to the published revision.
+     * A link to the published revision. This is only populated for Google Sites files.
      */
     publishedLink?: string | null;
     /**
diff --git a/src/apis/drive/v3.ts b/src/apis/drive/v3.ts
index 4b20efe512..eb0d80a0e4 100644
--- a/src/apis/drive/v3.ts
+++ b/src/apis/drive/v3.ts
@@ -745,7 +745,7 @@ export namespace drive_v3 {
      */
     teamDriveId?: string | null;
     /**
-     * A short-lived link to the file's thumbnail, if available. Typically lasts on the order of hours. Only populated when the requesting app can access the file's content.
+     * A short-lived link to the file's thumbnail, if available. Typically lasts on the order of hours. Only populated when the requesting app can access the file's content. If the file isn't shared publicly, the URL returned in Files.thumbnailLink must be fetched using a credentialed request.
      */
     thumbnailLink?: string | null;
     /**
@@ -1034,7 +1034,7 @@ export namespace drive_v3 {
      */
     published?: boolean | null;
     /**
-     * A link to the published revision.
+     * A link to the published revision. This is only populated for Google Sites files.
      */
     publishedLink?: string | null;
     /**