diff --git a/specification/cognitiveservices/data-plane/LUIS/Runtime/stable/v2.0/LUIS-Runtime.json b/specification/cognitiveservices/data-plane/LUIS/Runtime/stable/v2.0/LUIS-Runtime.json
index 36bbf757be65..aba7c1f5876b 100644
--- a/specification/cognitiveservices/data-plane/LUIS/Runtime/stable/v2.0/LUIS-Runtime.json
+++ b/specification/cognitiveservices/data-plane/LUIS/Runtime/stable/v2.0/LUIS-Runtime.json
@@ -4,7 +4,7 @@
     "title": "LUIS Runtime Client",
     "version": "2.0"
   },
-  "x-ms-parameterized-host": {
+   "x-ms-parameterized-host": {
     "hostTemplate": "{Endpoint}/luis/v2.0",
     "useSchemePrefix": false,
     "parameters": [
@@ -13,7 +13,7 @@
       }
     ]
   },
-  "securityDefinitions": {
+ "securityDefinitions": {
     "apiKeyHeader": {
       "type": "apiKey",
       "name": "Ocp-Apim-Subscription-Key",
@@ -35,6 +35,7 @@
             "name": "appId",
             "in": "path",
             "type": "string",
+            "format": "uuid",
             "required": true,
             "description": "The LUIS application ID (guid)."
           },
@@ -74,7 +75,7 @@
           {
             "name": "bing-spell-check-subscription-key",
             "in": "query",
-            "description": "The subscription key to use when enabling bing spell check",
+            "description": "The subscription key to use when enabling Bing spell check",
             "type": "string"
           },
           {
@@ -115,6 +116,7 @@
             "name": "appId",
             "in": "path",
             "type": "string",
+            "format":  "uuid",
             "required": true,
             "description": "The LUIS application ID (Guid)."
           },
@@ -155,7 +157,7 @@
           {
             "name": "bing-spell-check-subscription-key",
             "in": "query",
-            "description": "The subscription key to use when enabling bing spell check",
+            "description": "The subscription key to use when enabling Bing spell check",
             "type": "string"
           },
           {
@@ -327,7 +329,7 @@
       },
       "additionalProperties": {
         "type": "object",
-        "description": "List of additional properties. E.g.: score and resolution values for pre-built LUIS entities."
+        "description": "List of additional properties. For example, score and resolution values for pre-built LUIS entities."
       },
       "required": [
         "entity",