diff --git a/get-images-from-files/README.md b/get-images-from-files/README.md
index 00822ab..ad76b26 100644
--- a/get-images-from-files/README.md
+++ b/get-images-from-files/README.md
@@ -4,6 +4,8 @@ A reusable Gitea Action, that extracts docker images from selected files in a re
 
 The action supports Dockerfiles and Kubernetes manifests. Other files are supported if they have a recognizable image reference. Duplicate image references are deduplicated.
 
+**Note:** Only fully-qualified refs (with registry, e.g. `docker.io/library/alpine:latest`, `gcr.io/distroless/static:nonroot@sha256:...`) are included; short refs like `alpine:latest` are omitted as their use is discouraged.
+
 ## Usage
 
 ### Basic Usage