diff --git a/reference.html b/reference.html
index 57c71aa..bd4f040 100644
--- a/reference.html
+++ b/reference.html
@@ -494,8 +494,10 @@ given subject.</a>
 
 <p>Returns: A
 <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise">
-Promise</a> that resolves with no arguments on success, or rejects with no arguments if the client
-is denied access to write to the subject.</p>
+Promise</a> that resolves on success, or rejects with no arguments if the client is denied access
+to write to the subject. On success, a <a href="#message">message</a> argument is passed to the
+resolution callback; it differs from the original <code>message</code> argument in that it has
+metadata added by the server.</p>
 
 <p>Sends a <a href="#message">message</a> to the given <a href="#subject">subject</a>. The message
 contents are serialized and sent to the server (see