diff --git a/src/backend/routers/tool.py b/src/backend/routers/tool.py
index 78792cad66..6b375d982a 100644
--- a/src/backend/routers/tool.py
+++ b/src/backend/routers/tool.py
@@ -47,7 +47,7 @@ def list_tools(
     for tool in all_tools:
         # Tools with auth implementation can be enabled and visible but not accessible (e.g., if secrets are not set).
         # Therefore, we need to set is_auth_required for these types of tools as well for the frontend.
-        if (tool.is_available or tool.is_visible) and tool.auth_implementation is not None:
+        if (tool.is_available or tool.is_enabled) and tool.auth_implementation is not None:
             try:
                 tool_auth_service = tool.auth_implementation()
 
diff --git a/src/backend/services/auth/strategies/base.py b/src/backend/services/auth/strategies/base.py
index e305545824..38112519a2 100644
--- a/src/backend/services/auth/strategies/base.py
+++ b/src/backend/services/auth/strategies/base.py
@@ -43,14 +43,13 @@ class BaseOAuthStrategy:
     def __init__(self, *args, **kwargs):
         self._post_init_check()
 
-    @classmethod
-    def _post_init_check(cls):
+    def _post_init_check(self):
         if any(
             [
-                cls.NAME is None,
+                self.NAME is None,
             ]
         ):
-            raise ValueError(f"{cls.__name__} must have NAME attribute defined.")
+            raise ValueError(f"{self.__name__} must have NAME attribute defined.")
 
     @abstractmethod
     def get_client_id(self, **kwargs: Any):
diff --git a/src/backend/tools/base.py b/src/backend/tools/base.py
index f8bc62b32b..af5456b217 100644
--- a/src/backend/tools/base.py
+++ b/src/backend/tools/base.py
@@ -67,13 +67,12 @@ def __init__(self, *args, **kwargs):
 
         self._post_init_check()
 
-    @classmethod
-    def _post_init_check(cls):
+    def _post_init_check(self):
         if any(
             [
-                cls.BACKEND_HOST is None,
-                cls.FRONTEND_HOST is None,
-                cls.AUTH_SECRET_KEY is None,
+                self.BACKEND_HOST is None,
+                self.FRONTEND_HOST is None,
+                self.AUTH_SECRET_KEY is None,
             ]
         ):
             raise ValueError(
diff --git a/src/backend/tools/slack/tool.py b/src/backend/tools/slack/tool.py
index 107afb6ddf..33f1471700 100644
--- a/src/backend/tools/slack/tool.py
+++ b/src/backend/tools/slack/tool.py
@@ -38,7 +38,7 @@ def get_tool_definition(cls) -> ToolDefinition:
                     "required": True,
                 }
             },
-            is_enabled=True,
+            is_enabled=False,
             is_available=cls.is_available(),
             is_default_tool=False,
             is_background_tool=False,