diff --git a/spec/Section 3 -- Type System.md b/spec/Section 3 -- Type System.md
index 79953a4e0..bfe967298 100644
--- a/spec/Section 3 -- Type System.md	
+++ b/spec/Section 3 -- Type System.md	
@@ -58,7 +58,7 @@ via introspection.
 
 [Descriptions](#sec-Descriptions) allow GraphQL service designers to easily
 provide documentation which remains consistent with the capabilities of a
-GraphQL service. Descriptions provided as Markdown (as specified by
+GraphQL service. Descriptions should be provided as Markdown (as specified by
 [CommonMark](https://commonmark.org/)) for every definition in a type system.
 
 GraphQL schema and all other definitions (e.g. types, fields, arguments, etc.)