diff --git a/server/schema/services/models.conf b/server/schema/services/models.conf
index ed88536..3932b17 100644
--- a/server/schema/services/models.conf
+++ b/server/schema/services/models.conf
@@ -261,7 +261,7 @@
                         type: string
                     }
                     uri {
-                        description: "URI for the model"
+                        description: "URI for the model. Exactly one of uri or override_model_id is a required."
                         type: string
                     }
                     name {
@@ -283,7 +283,7 @@
                         items {type: string}
                     }
                     override_model_id {
-                        description: "Override model ID. If provided, this model is updated in the task."
+                        description: "Override model ID. If provided, this model is updated in the task. Exactly one of override_model_id or uri is required."
                         type: string
                     }
                     iteration {