diff --git a/libs/hackbot-runtime/hackbot_runtime/actions/phabricator.py b/libs/hackbot-runtime/hackbot_runtime/actions/phabricator.py
index 9d7b162f53..2f3a93e214 100644
--- a/libs/hackbot-runtime/hackbot_runtime/actions/phabricator.py
+++ b/libs/hackbot-runtime/hackbot_runtime/actions/phabricator.py
@@ -71,8 +71,10 @@ async def submit_patch(
         str | None,
         Field(
             description=(
-                "Revision summary/description. Keep test and verification details "
-                "in test_plan instead."
+                "Revision summary/description. Keep it concise and useful for permanent "
+                "history. Do not restate the bug, narrate the investigation or "
+                "implementation process. Keep test and verification details in "
+                "test_plan instead."
             ),
         ),
     ] = None,