diff --git a/specification/schema/asset.schema.json b/specification/schema/asset.schema.json
index 4d29fd0dd..9cf6b5fe0 100644
--- a/specification/schema/asset.schema.json
+++ b/specification/schema/asset.schema.json
@@ -5,6 +5,10 @@
     "$ref": "./common/rootProperty.schema.json",
     "description": "Metadata about the entire tileset.",
     "properties": {
+        "generator": {
+            "type": "string",
+            "description": "The name and version number of the tool that generated this 3D Tiles model.  Useful for debugging."
+        },
         "version": {
             "type": "string",
             "description": "The 3D Tiles version. The version defines the JSON schema for the tileset JSON and the base set of tile formats."