diff --git a/syndicate/drivers/tcp.rkt b/syndicate/drivers/tcp.rkt
index b022095..e594a3c 100644
--- a/syndicate/drivers/tcp.rkt
+++ b/syndicate/drivers/tcp.rkt
@@ -9,6 +9,10 @@
 ;; This would be nicer if it never signalled "open" at all, instead
 ;; asserting something like `tcp-error` until interest in the
 ;; connection goes away.
+;;
+;; TODO: This protocol is overly simplified.
+;; a) no flow control
+;; b) no facility for separate shutdown of inbound/outbound streams
 
 (provide (struct-out tcp-connection)
          (struct-out tcp-accepted)