Add clarifying comment
diff --git a/include/grpc/grpc.h b/include/grpc/grpc.h
index ce01b2d..6e26dd0 100644
--- a/include/grpc/grpc.h
+++ b/include/grpc/grpc.h
@@ -244,7 +244,10 @@
GRPC_OP_RECV_INITIAL_METADATA,
/* Receive a message: 0 or more of these operations can occur for each call */
GRPC_OP_RECV_MESSAGE,
- /* Receive status on the client: one and only one must be made on the client
+ /* Receive status on the client: one and only one must be made on the client.
+ This operation always succeeds, meaning ops paired with this operation
+ will also appear to succeed, even though they may not have. In that case
+ the status will indicate some failure.
*/
GRPC_OP_RECV_STATUS_ON_CLIENT,
/* Receive status on the server: one and only one must be made on the server