diff --git a/api/client-server/event_context.yaml b/api/client-server/event_context.yaml
index 3bea351cf4b..5fbfc19899a 100644
--- a/api/client-server/event_context.yaml
+++ b/api/client-server/event_context.yaml
@@ -59,6 +59,18 @@ paths:
           description: |-
             The maximum number of events to return. Default: 10.
           x-example: 3
+        - in: query
+          name: filter
+          type: string
+          description: |-
+            A JSON ``RoomEventFilter`` to filter the returned events with. The
+            filter is only applied to ``events_before``, ``events_after``, and
+            ``state``. It is not applied to the ``event`` itself. The filter may 
+            be applied before or/and after the ``limit`` parameter - whichever the 
+            homeserver prefers.
+
+            See `Filtering <#filtering>`_ for more information.
+          x-example: "66696p746572"
       responses:
         200:
           description: The events and state surrounding the requested event.
diff --git a/changelogs/client_server/newsfragments/2344.clarification b/changelogs/client_server/newsfragments/2344.clarification
new file mode 100644
index 00000000000..8c92d31ee54
--- /dev/null
+++ b/changelogs/client_server/newsfragments/2344.clarification
@@ -0,0 +1 @@
+Add missing information on how filters are meant to work with ``/context``.