diff --git a/p-process.yml b/p-process.yml
index 0a93844b..f0660706 100644
--- a/p-process.yml
+++ b/p-process.yml
@@ -179,6 +179,7 @@ components:
           additionalProperties: true
         dtc:
           type: string
+          description: "Digital Travel Credential (DTC-VC) data in base64 format for processing"
         ImageUrls:
           type: array
           description: "URLs to the document images for processing."