diff --git a/apps/api/src/api/tool_instances.py b/apps/api/src/api/tool_instances.py
index 32ee7c1..62eabe1 100644
--- a/apps/api/src/api/tool_instances.py
+++ b/apps/api/src/api/tool_instances.py
@@ -475,7 +475,7 @@ async def _validate_config_profile(
     Raises:
         HTTPException: If profile is not found, not owned, or incompatible.
     """
-    if profile_id is None:
+    if not profile_id:
         return None
 
     try: