diff --git a/api/constants/position.py b/api/constants/position.py
deleted file mode 100644
index 4dfdbaf49a..0000000000
--- a/api/constants/position.py
+++ /dev/null
@@ -1,3 +0,0 @@
-# Used to mark a position as excluded.
-# See api/core/helper/position_helper.py for more details.
-POSITION_EXCLUDED = -999
diff --git a/api/core/helper/position_helper.py b/api/core/helper/position_helper.py
index b52ae580c8..c73f466a51 100644
--- a/api/core/helper/position_helper.py
+++ b/api/core/helper/position_helper.py
@@ -76,7 +76,7 @@ def is_filtered(
         exclude_set: set[str],
         data: Any,
         name_func: Callable[[Any], str],
-) -> list[Any]:
+) -> bool:
     """
     Chcek if the object should be filtered out.
     :param include_set: the set of names to be included
diff --git a/api/core/tools/tool_manager.py b/api/core/tools/tool_manager.py
index f99ab25cb2..4a0188af49 100644
--- a/api/core/tools/tool_manager.py
+++ b/api/core/tools/tool_manager.py
@@ -402,7 +402,7 @@ class ToolManager:
             db_builtin_providers: list[BuiltinToolProvider] = db.session.query(BuiltinToolProvider). \
                 filter(BuiltinToolProvider.tenant_id == tenant_id).all()
 
-            def find_db_builtin_provider(provider): return next(
+            find_db_builtin_provider = lambda provider: next(
                 (x for x in db_builtin_providers if x.provider == provider),
                 None
             )
diff --git a/api/services/tools/builtin_tools_manage_service.py b/api/services/tools/builtin_tools_manage_service.py
index 79b07b54ca..ebadbd9be0 100644
--- a/api/services/tools/builtin_tools_manage_service.py
+++ b/api/services/tools/builtin_tools_manage_service.py
@@ -198,7 +198,7 @@ class BuiltinToolManageService:
         ).all() or []
 
         # find provider
-        def find_provider(provider): return next(filter(lambda db_provider: db_provider.provider == provider, db_providers), None)
+        find_provider = lambda provider: next(filter(lambda db_provider: db_provider.provider == provider, db_providers), None)
 
         result: list[UserToolProvider] = []