diff --git a/pw_snapshot/pw_snapshot_protos/snapshot_metadata.proto b/pw_snapshot/pw_snapshot_protos/snapshot_metadata.proto
index dabf49b0a5..12b3ffbd98 100644
--- a/pw_snapshot/pw_snapshot_protos/snapshot_metadata.proto
+++ b/pw_snapshot/pw_snapshot_protos/snapshot_metadata.proto
@@ -48,8 +48,11 @@ message Metadata {
   bytes project_name = 3 [(tokenizer.format) = TOKENIZATION_OPTIONAL];
 
   // Version characters must be alphanumeric, punctuation, and space. This
-  // string is case-sensitive. This should either be human readable text, or
-  // tokenized data.
+  // string is case-sensitive. This should always be human readable text, and
+  // does not support tokenization by design. If this field was tokenized, it's
+  // possible that the token could be lost (e.g. generated by a local developer
+  // build and not uploaded anywhere) and a firmware version running on a device
+  // in the field would be left entirely unidentifiable.
   //
   // Examples:
   //   "codename-local-[build_id]"