Update howto-append-custom-suffix-to-interface-descriptions.md

Author: sushantjrao

articles/operator-nexus/howto-append-custom-suffix-to-interface-descriptions.md

@@ -11,11 +11,13 @@ ms.custom: template-how-to
 
 # Append custom suffix to interface descriptions in Azure Operator Nexus Network Fabric
 
-This guide explains how to append a user-defined suffix (`additionalDescription`) to interface descriptions in Azure Operator Nexus Network Fabric. This feature provides enhanced flexibility for operational annotations, allowing users to customize interface descriptions for specific maintenance or operational requirements.
+TThis guide explains how to append a user-defined suffix (`additionalDescription`) to interface descriptions in Azure Operator Nexus Network Fabric. The primary interface description is `read-only,` but the `additionalDescription` property provides enhanced flexibility for operational annotations. This allows users to customize interface descriptions for specific maintenance or operational requirements without altering the system-generated description.
 
 ## Prerequisites
 
-- **Azure CLI**: Version 2.61 or higher
+- **Azure CLI**: Version 2.69 or higher.
+
+- Install CLI extension **`managednetworkfabric`** 8.0.0 or higher.
 
 ## Steps to append a custom suffix
 
@@ -41,6 +43,8 @@ az networkfabric interface show -g "example-rg" \
 
 ### 2. Append a suffix to the interface description
 
+The primary interface description (e.g., AR-CE2(Fab3-AR-CE2):Et1/1 to CR1-TOR1(Fab3-CP1-TOR1)-Port23) is read-only and cannot be modified. However, you can append a custom suffix using the additional-description property. This updates only the additional-description field while keeping the main description unchanged.
+
 To add a custom suffix, use the following command:
 
 ```Azure CLI