diff --git a/models.py b/models.py
index c8fea0e..36bc25b 100644
--- a/models.py
+++ b/models.py
@@ -39,7 +39,8 @@ ability_model = {
     'ability': fields.String(
         required=False,
         default="all",
-        description='The ability to roll. Not required. Defaults to "all".'),
+        description='The ability to roll. Not required. Valid options: "m-strength", "p-strength", '
+                    '"intelligence", "charisma", "constitution", "dexterity", "all". Defaults to "all".'),
 }
 
 # Hp model