diff --git a/backend/src/main/java/org/raddatz/familienarchiv/document/DocumentService.java b/backend/src/main/java/org/raddatz/familienarchiv/document/DocumentService.java
index 624a2a37..dc4d70e4 100644
--- a/backend/src/main/java/org/raddatz/familienarchiv/document/DocumentService.java
+++ b/backend/src/main/java/org/raddatz/familienarchiv/document/DocumentService.java
@@ -1007,9 +1007,10 @@ public class DocumentService {
     }
 
     /**
-     * Lean document lookup for embedding in JourneyItemView. Skips
-     * {@code tagService.resolveEffectiveColors} — ×N items per journey GET is wasted
-     * work that summary consumers never read. Called within a caller-provided transaction.
+     * Lightweight summary lookup for internal use (e.g. journey item append validation).
+     * Intentionally skips scope checks and tag-colour resolution — safe only
+     * under the current single-tenant model where all authenticated users share
+     * the same document scope. Called within a caller-provided transaction.
      */
     public Document getSummaryById(UUID id) {
         return documentRepository.findById(id)