diff --git a/assets/data/toolsNav.ts b/assets/data/toolsNav.ts
index 02b322c4..24790753 100644
--- a/assets/data/toolsNav.ts
+++ b/assets/data/toolsNav.ts
@@ -8,6 +8,11 @@ export default <NavSection[]>[
                 i18n: "_mfmPlayground.title",
                 description: "_mfmPlayground.description",
                 to: "/tools/mfm-playground/",
+            },
+            {
+                i18n: "_aidConverter.title",
+                description: "_aidConverter.description",
+                to: "/tools/mfm-playground/",
             }
         ]
     }
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 92e36a16..3466c7f7 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -193,6 +193,7 @@ _mfmPlayground:
 
 _aidConverter:
   title: "aid/aidxツール"
+  description: "Misskeyの内部で使用されているランダムID生成アルゴリズム「aid」と「aidx」の変換・生成ができます。"
   aidToDate: "aid/aidx→日付時刻"
   dateToAid: "日付時刻→aid/aidx"
   mode: "作成するid"