Update servicePrincipalNames property description

Author: shlipsey3

api-reference/beta/resources/agentidentityblueprintprincipal.md

@@ -77,7 +77,7 @@ This resource is an open type that allows additional properties beyond those doc
 |info|[informationalUrl](../resources/informationalurl.md)|Basic profile information of the acquired application such as app's marketing, support, terms of service and privacy statement URLs. The terms of service and privacy statement are surfaced to users through the user consent experience. Inherited from [servicePrincipal](../resources/serviceprincipal.md).|
 |publishedPermissionScopes|[permissionScope](../resources/permissionscope.md) collection|The delegated permissions exposed by the application. For more information, see the **oauth2PermissionScopes** property on the agent identity blueprint entity's **api** property. Not nullable. Inherited from [servicePrincipal](../resources/serviceprincipal.md).|
 |publisherName|String|The name of the Microsoft Entra tenant that published the application. Inherited from [servicePrincipal](../resources/serviceprincipal.md).|
-|servicePrincipalNames|String collection|Contains the list of **identifiersUris**, copied over from the associated agent identity blueprint. More values can be added to hybrid agent identity blueprint. These values can be used to identify the permissions exposed by this app within Microsoft Entra ID. Not nullable. **Property blocked on Agent Identity Blueprint Principal.** Inherited from [servicePrincipal](../resources/serviceprincipal.md).|
+|servicePrincipalNames|String collection|Read-only **identifierUris** used to identify the permissions exposed by this app within Microsoft Entra ID. Not nullable. **Property blocked on Agent Identity Blueprint Principal**. Inherited from [servicePrincipal](../resources/serviceprincipal.md).|
 |servicePrincipalType|String|Identifies if the agent identity blueprint principal represents an application. This is set by Microsoft Entra ID internally. For an agent identity blueprint principal that represents an application this is set as __Application__. Inherited from [servicePrincipal](../resources/serviceprincipal.md).|
 |signInAudience|String|Specifies the Microsoft accounts that are supported for the current agent identity blueprint. Read-only. Supported values are: `AzureADMyOrg`, `AzureADMultipleOrgs`, `AzureADandPersonalMicrosoftAccount`, and `PersonalMicrosoftAccount`. Inherited from [servicePrincipal](../resources/serviceprincipal.md).|
 |tags|String collection|Custom strings that can be used to categorize and identify the agent identity blueprint principal. Not nullable. The value is the union of strings set here and on the associated agent identity blueprint entity's **tags** property. Inherited from [servicePrincipal](../resources/serviceprincipal.md).|