diff --git a/telethon/types/_custom/message.py b/telethon/types/_custom/message.py
index d0db2220..8640f70c 100644
--- a/telethon/types/_custom/message.py
+++ b/telethon/types/_custom/message.py
@@ -1265,9 +1265,11 @@ class Message(ChatGetter, SenderGetter):
                 await self.get_input_chat(), self.id)
 
     async def react(self, reaction=None):
-        # TODO Constantly checking if client is a bit annoying,
-        #      maybe just make it illegal to call messages from raw API?
-        #      That or figure out a way to always set it directly.
+        """
+        Reacts on the given message. Shorthand for
+        `telethon.client.messages.MessageMethods.send_reaction`
+        with both ``entity`` and ``message`` already set.
+        """
         if self._client:
             return await self._client.send_reaction(
                 await self.get_input_chat(),