diff --git a/konabot/common/permsys/__init__.py b/konabot/common/permsys/__init__.py
index 91f802c..31b2927 100644
--- a/konabot/common/permsys/__init__.py
+++ b/konabot/common/permsys/__init__.py
@@ -29,10 +29,21 @@ async def _to_entity_chain(el: _EntityLike):
 
 
 class PermManager:
+    """
+    权限管理模块
+    """
+
     def __init__(self, db: DatabaseManager) -> None:
         self.db = db
 
-    async def get_permission_info(self, entities: _EntityLike, key: str):
+    async def get_permission_info(
+        self, entities: _EntityLike, key: str
+    ) -> tuple[PermEntity, str, bool] | None:
+        """
+        获得一个权限实体或权限实体串对一个 key 的权限信息。若未入库（默认值）则
+        代表没有该权限相关的记录
+        """
+
         entities = await _to_entity_chain(entities)
         key = key.removesuffix("*").removesuffix(".")
         key_split = key.split(".")
@@ -52,17 +63,29 @@ class PermManager:
         return None
 
     async def check_has_permission(self, entities: _EntityLike, key: str) -> bool:
+        """
+        检查一个权限实体或者权限实体串是否有权限
+        """
+
         res = await self.get_permission_info(entities, key)
         if res is None:
             return False
         return res[2]
 
     async def update_permission(self, entity: PermEntity, key: str, perm: bool | None):
+        """
+        更新一个具体的权限实体的一则权限
+        """
+
         async with self.db.get_conn() as conn:
             repo = PermRepo(conn)
             await repo.update_perm_info(entity, key, perm)
 
     async def list_permission(self, entities: _EntityLike, query: PagerQuery):
+        """
+        列出一个权限实体或权限实体串拥有的所有权限记录
+        """
+
         entities = await _to_entity_chain(entities)
         async with self.db.get_conn() as conn:
             repo = PermRepo(conn)
diff --git a/konabot/common/permsys/entity.py b/konabot/common/permsys/entity.py
index 0789479..d2add9d 100644
--- a/konabot/common/permsys/entity.py
+++ b/konabot/common/permsys/entity.py
@@ -22,6 +22,11 @@ class PermEntity:
 
 
 def get_entity_chain_of_entity(entity: PermEntity) -> list[PermEntity]:
+    """
+    获得一个权限实体的权限串。实际上返回三个权限，从小到大分别是用户、平台全体和
+    系统全局的权限实体。
+    """
+
     return [
         PermEntity("sys", "global", "global"),
         PermEntity(entity.platform, "global", "global"),
@@ -30,6 +35,10 @@ def get_entity_chain_of_entity(entity: PermEntity) -> list[PermEntity]:
 
 
 async def get_entity_chain(event: Event) -> list[PermEntity]:  # pragma: no cover
+    """
+    获得一个 Nonebot Event 的权限实体串。
+    """
+
     entities = [PermEntity("sys", "global", "global")]
 
     if isinstance(event, OB11Event):