diff --git a/api/core/tools/tool_manager.py b/api/core/tools/tool_manager.py
index f8f07369d0..b4252e1a3e 100644
--- a/api/core/tools/tool_manager.py
+++ b/api/core/tools/tool_manager.py
@@ -993,7 +993,7 @@ class ToolManager:
             return {"background": "#252525", "content": "\ud83d\ude01"}
 
     @classmethod
-    def generate_mcp_tool_icon_url(cls, tenant_id: str, provider_id: str) -> EmojiIconDict | dict[str, str] | str:
+    def generate_mcp_tool_icon_url(cls, tenant_id: str, provider_id: str) -> EmojiIconDict | str:
         try:
             with Session(db.engine) as session:
                 mcp_service = MCPToolManageService(session=session)
@@ -1001,7 +1001,7 @@ class ToolManager:
                     mcp_provider = mcp_service.get_provider_entity(
                         provider_id=provider_id, tenant_id=tenant_id, by_server_id=True
                     )
-                    return mcp_provider.provider_icon
+                    return cast(EmojiIconDict | str, mcp_provider.provider_icon)
                 except ValueError:
                     raise ToolProviderNotFoundError(f"mcp provider {provider_id} not found")
         except Exception:
@@ -1013,7 +1013,7 @@ class ToolManager:
         tenant_id: str,
         provider_type: ToolProviderType,
         provider_id: str,
-    ) -> str | EmojiIconDict | dict[str, str]:
+    ) -> str | EmojiIconDict:
         """
         get the tool icon