Update odata-protocol/11.5 Operations.md

odata-protocol/11.5 Operations.md

@@ -506,7 +506,7 @@ and MAY include a [`Retry-After`](#HeaderRetryAfter) header to be used for a sub
 contain the same values as returned by the previous request.
 
 Once the asynchronous processing has completed, a `GET` request to the status monitor resource returns [`200 OK`](#ResponseCode200OK),
-or [`204 No Content`](#ResponseCode204NoContent) if the request included a `Prefer` header with a value of `return=minimal`.
+or [`204 No Content`](#ResponseCode204NoContent) if the request included a `Prefer` header with a value of `return=minimal` that was applied by the service.
 For OData 4.01 or greater responses, or OData 4.0 requests that include an `Accept` header that
 does not specify `application/http`, the response MUST include the
 [`AsyncResult`](#HeaderAsyncResult) response header.