diff --git a/synapse/handlers/delayed_events.py b/synapse/handlers/delayed_events.py
index 3da08971ee..864dc02db3 100644
--- a/synapse/handlers/delayed_events.py
+++ b/synapse/handlers/delayed_events.py
@@ -347,7 +347,9 @@ class DelayedEventsHandler:
                 If None, the timestamp will be the actual time when the event is sent.
             content: The content of the event to be sent.
             delay: How long (in milliseconds) to wait before automatically sending the event.
-            sticky_duration_ms: The sticky duration if any, see MSC4354.
+            sticky_duration_ms: If an MSC4354 sticky event: the sticky duration (in milliseconds).
+                The event will be attempted to be reliably delivered to clients and remote servers
+                during its sticky period.
         Returns: The ID of the added delayed event.
 
         Raises:
diff --git a/synapse/replication/tcp/streams/_base.py b/synapse/replication/tcp/streams/_base.py
index 07b3707071..336b50160b 100644
--- a/synapse/replication/tcp/streams/_base.py
+++ b/synapse/replication/tcp/streams/_base.py
@@ -770,7 +770,9 @@ class StickyEventsStreamRow:
     """Stream to inform workers about changes to sticky events."""
 
     room_id: str
-    event_id: str  # The sticky event ID
+
+    event_id: str
+    """The sticky event ID"""
 
 
 class StickyEventsStream(_StreamFromIdGen):