diff --git a/plugins/platforms/slack/adapter.py b/plugins/platforms/slack/adapter.py
index 62a5fdcd5f2..736598dba88 100644
--- a/plugins/platforms/slack/adapter.py
+++ b/plugins/platforms/slack/adapter.py
@@ -3936,16 +3936,14 @@ class SlackAdapter(BasePlatformAdapter):
             return ""
         return (
             f"You are connected to this Slack workspace as the bot "
-            f'"@{name}". The Slack adapter already applied authorization, mention, '
-            f"and channel-routing rules before delivering this message. Treat every "
-            f"delivered turn as intentionally routed to you, including a message "
-            f"accepted from a free-response channel or active thread. Your own routing "
-            f'mention "@{name}" may have been removed from the model-visible text. '
-            f"Do not ask for another mention, reject the message, or stay silent solely "
-            f'because "@{name}" is absent. In messages, each line is prefixed with the '
-            f"sender's name, and visible mentions are shown as @DisplayName; a mention "
-            f"of any other participant is not a mention of you, even if their name is "
-            f"similar."
+            f'"@{name}". The adapter already applied mention and channel '
+            f"routing; treat every delivered turn as intentionally routed to "
+            f'you. Your routing mention "@{name}" may have been stripped from '
+            f'the visible text — do not reject or ignore a message solely '
+            f'because "@{name}" is absent. In messages, each line is prefixed '
+            f"with the sender's name, and visible mentions are shown as "
+            f"@DisplayName; a mention of any other participant is not a "
+            f"mention of you, even if their name is similar."
         )
 
     async def _resolve_user_is_bot(
diff --git a/tests/gateway/test_slack.py b/tests/gateway/test_slack.py
index 15a0faf5eb4..d9acaefaf6b 100644
--- a/tests/gateway/test_slack.py
+++ b/tests/gateway/test_slack.py
@@ -1887,9 +1887,9 @@ class TestMessageRouting:
         assert msg_event.text == "Hi"
         assert "@WorkspaceBot" in prompt
         assert "already applied" in prompt
-        assert "may have been removed" in prompt
-        assert "Do not ask for another mention" in prompt
-        assert "free-response channel or active thread" in prompt
+        assert "may have been stripped" in prompt
+        assert "do not reject or ignore" in prompt
+        assert "intentionally routed" in prompt
         assert "not a mention of you" in prompt
         assert "Only treat a message as directed" not in prompt