diff --git a/services/api-server/src/simcore_service_api_server/models/schemas/studies.py b/services/api-server/src/simcore_service_api_server/models/schemas/studies.py
index cd7bdb720a31..7bef4e650981 100644
--- a/services/api-server/src/simcore_service_api_server/models/schemas/studies.py
+++ b/services/api-server/src/simcore_service_api_server/models/schemas/studies.py
@@ -10,6 +10,7 @@
 class StudyPort(SolverPort):
     key: NodeID = Field(
         ...,
-        description="port identifier name",
+        description="port identifier name."
+        "Correponds to the UUID of the parameter/probe node in the study",
         title="Key name",
     )