diff --git a/vpr/src/server/telegramoptions.h b/vpr/src/server/telegramoptions.h
index afa37e1478a..1c7ae9f926c 100644
--- a/vpr/src/server/telegramoptions.h
+++ b/vpr/src/server/telegramoptions.h
@@ -62,6 +62,8 @@ class TelegramOptions {
      *
      * This function retrieves a map of sets associated with the specified key.
      *
+     * @note The map of sets is used to store the critical path index (map key) and the associated set of selected sub-path element indexes (map value).
+     *
      * @param key The key of the map of sets to retrieve.
      * @return The map of sets associated with the specified key.
      */