diff --git a/chapters/annotations.tex b/chapters/annotations.tex
index 17f48332c..b0fe77513 100644
--- a/chapters/annotations.tex
+++ b/chapters/annotations.tex
@@ -2059,6 +2059,8 @@ \subsection{Protection of Classes}\label{protection-of-classes}
 Overriding \lstinline!access=Access.hide! or \lstinline!access=Access.packageDuplicate! has no effect.
 
 Classes should not use other classes in ways that contradict this protection.
+Tools must ensure that protected contents is not shown, even if classes do not meet this requirement.
+
 For instance a class with \lstinline!Access.hide! should not be used in the diagram layer of a class with \lstinline!Access.diagram!, and there should not be hyperlinks to classes with \lstinline!Access.icon! (from classes with visible documentation).
 
 \begin{example}