diff --git a/composable-interconnect-fasm-mux-levels.xml b/composable-interconnect-fasm-mux-levels.xml
index c75d66b..4c33420 100644
--- a/composable-interconnect-fasm-mux-levels.xml
+++ b/composable-interconnect-fasm-mux-levels.xml
@@ -1,4 +1,6 @@
 <?xml version="1.0"?>
+<!-- Test the special handling around the fasm_mux metadata when using
+     composable interconnects and existing metadata. -->
 <xml>
  <pb_type name="parent">
   <input name="i0" />
diff --git a/composable-interconnect-fasm-mux.xml b/composable-interconnect-fasm-mux.xml
index a52d9a7..741401c 100644
--- a/composable-interconnect-fasm-mux.xml
+++ b/composable-interconnect-fasm-mux.xml
@@ -1,4 +1,6 @@
 <?xml version="1.0"?>
+<!-- Test the special handling around the fasm_mux metadata when using
+     composable interconnects. -->
 <xml>
  <pb_type name="parent">
   <input name="i0" />