diff --git a/xml/ns-Microsoft.Extensions.Primitives.xml b/xml/ns-Microsoft.Extensions.Primitives.xml
index 7e041e2a0ba..ba44eb8edc7 100644
--- a/xml/ns-Microsoft.Extensions.Primitives.xml
+++ b/xml/ns-Microsoft.Extensions.Primitives.xml
@@ -1,6 +1,6 @@
 <Namespace Name="Microsoft.Extensions.Primitives">
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Provides primitive types for Microsoft's extension libraries.</summary>
     <remarks>To be added.</remarks>
   </Docs>
 </Namespace>