diff --git a/zuul.d/pipelines.yaml b/zuul.d/pipelines.yaml
index d0d9c85b45..cfe29cf528 100644
--- a/zuul.d/pipelines.yaml
+++ b/zuul.d/pipelines.yaml
@@ -101,7 +101,10 @@
 
 - pipeline:
     name: post
-    description: This pipeline runs jobs that operate after each change is merged.
+    description: |
+      This pipeline runs jobs that operate after each change is
+      merged. Queue items are identified by the abbreviated hash (git
+      log --format=%h) of the merge commit.
     manager: independent
     precedence: low
     post-review: True