diff --git a/debug/debug.proto b/debug/debug.proto
index 9899f0d0..9fa00e6d 100644
--- a/debug/debug.proto
+++ b/debug/debug.proto
@@ -41,7 +41,7 @@ message DebugRequest {
   enum Mode {
     MODE_UNSPECIFIED = 0;
     MODE_SHELL = 1; // Run the command using a standard Unix shell.
-    MODE_CLI = 2;
+    MODE_CLI = 2; // Run the command using the vendor specific native CLI.
   }
   // Mode the commands will be executed in.
   Mode mode = 1;