diff --git a/app/agent/tools/impl/add_download.py b/app/agent/tools/impl/add_download.py
index 21dcf245..3823bb8a 100644
--- a/app/agent/tools/impl/add_download.py
+++ b/app/agent/tools/impl/add_download.py
@@ -32,7 +32,7 @@ class AddDownloadInput(BaseModel):
 
 class AddDownloadTool(MoviePilotTool):
     name: str = "add_download"
-    description: str = "Add torrent download task to the configured downloader (qBittorrent, Transmission, etc.). Downloads the torrent file and starts the download process with specified settings."
+    description: str = "Add torrent download task to the configured downloader (qBittorrent, Transmission, etc.). Downloads the torrent file and starts the download process with specified settings. The site's priority (pri) is used for ordering downloads - smaller values have higher priority (e.g., pri=1 has higher priority than pri=10)."
     args_schema: Type[BaseModel] = AddDownloadInput
 
     def get_tool_message(self, **kwargs) -> Optional[str]:
diff --git a/app/agent/tools/impl/query_sites.py b/app/agent/tools/impl/query_sites.py
index 5992e6b0..028f75b1 100644
--- a/app/agent/tools/impl/query_sites.py
+++ b/app/agent/tools/impl/query_sites.py
@@ -21,7 +21,7 @@ class QuerySitesInput(BaseModel):
 
 class QuerySitesTool(MoviePilotTool):
     name: str = "query_sites"
-    description: str = "Query site status and list all configured sites. Shows site name, domain, status, priority, and basic configuration."
+    description: str = "Query site status and list all configured sites. Shows site name, domain, status, priority, and basic configuration. Site priority (pri): smaller values have higher priority (e.g., pri=1 has higher priority than pri=10)."
     args_schema: Type[BaseModel] = QuerySitesInput
 
     def get_tool_message(self, **kwargs) -> Optional[str]:
diff --git a/app/agent/tools/impl/search_torrents.py b/app/agent/tools/impl/search_torrents.py
index bed8cab6..75c5766d 100644
--- a/app/agent/tools/impl/search_torrents.py
+++ b/app/agent/tools/impl/search_torrents.py
@@ -30,7 +30,7 @@ class SearchTorrentsInput(BaseModel):
 
 class SearchTorrentsTool(MoviePilotTool):
     name: str = "search_torrents"
-    description: str = "Search for torrent files across configured indexer sites based on media information. Returns available torrent downloads with details like file size, quality, and download links."
+    description: str = "Search for torrent files across configured indexer sites based on media information. Returns available torrent downloads with details like file size, quality, and download links. Sites are searched in priority order (smaller priority value = higher priority, e.g., pri=1 sites are searched before pri=10 sites)."
     args_schema: Type[BaseModel] = SearchTorrentsInput
 
     def get_tool_message(self, **kwargs) -> Optional[str]:
diff --git a/app/agent/tools/impl/update_site.py b/app/agent/tools/impl/update_site.py
index a3b18ead..59d5349b 100644
--- a/app/agent/tools/impl/update_site.py
+++ b/app/agent/tools/impl/update_site.py
@@ -20,7 +20,7 @@ class UpdateSiteInput(BaseModel):
     site_id: int = Field(..., description="The ID of the site to update")
     name: Optional[str] = Field(None, description="Site name (optional)")
     url: Optional[str] = Field(None, description="Site URL (optional, will be automatically formatted)")
-    pri: Optional[int] = Field(None, description="Site priority (optional, higher number = higher priority)")
+    pri: Optional[int] = Field(None, description="Site priority (optional, smaller value = higher priority, e.g., pri=1 has higher priority than pri=10)")
     rss: Optional[str] = Field(None, description="RSS feed URL (optional)")
     cookie: Optional[str] = Field(None, description="Site cookie (optional)")
     ua: Optional[str] = Field(None, description="User-Agent string (optional)")
@@ -39,7 +39,7 @@ class UpdateSiteInput(BaseModel):
 
 class UpdateSiteTool(MoviePilotTool):
     name: str = "update_site"
-    description: str = "Update site configuration including URL, priority, authentication credentials (cookie, UA, API key), proxy settings, rate limits, and other site properties. Supports updating multiple site attributes at once."
+    description: str = "Update site configuration including URL, priority, authentication credentials (cookie, UA, API key), proxy settings, rate limits, and other site properties. Supports updating multiple site attributes at once. Site priority (pri): smaller values have higher priority (e.g., pri=1 has higher priority than pri=10)."
     args_schema: Type[BaseModel] = UpdateSiteInput
 
     def get_tool_message(self, **kwargs) -> Optional[str]: