diff --git a/telemetry/service/service-model.json b/telemetry/service/service-model.json
index 8d4b5ef4..ec920df9 100644
--- a/telemetry/service/service-model.json
+++ b/telemetry/service/service-model.json
@@ -189,6 +189,9 @@
         "OS":{"shape":"Value"},
         "OSVersion":{"shape":"Value"},
         "ComputeEnv": {"shape":"ComputeEnv"},
+        "SessionId": {"shape":"SessionId"},
+        "userAgent": {"shape":"Value"},
+        "lspVersion": {"shape":"Value"},
         "ParentProduct":{"shape":"Value"},
         "ParentProductVersion":{"shape":"Value"},
         "Metadata":{"shape":"Metadata"},
@@ -212,6 +215,9 @@
         "OSArchitecture":{"shape":"Value"},
         "OSVersion":{"shape":"Value"},
         "ComputeEnv": {"shape":"ComputeEnv"},
+        "SessionId": {"shape":"SessionId"},
+        "userAgent": {"shape":"Value"},
+        "lspVersion": {"shape":"Value"},
         "ParentProduct":{"shape":"Value"},
         "ParentProductVersion":{"shape":"Value"},
         "MetricData":{"shape":"MetricData"}
@@ -224,6 +230,10 @@
         "Negative"
       ]
     },
+    "SessionId":{
+      "type":"string",
+      "pattern":"^[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{12}$"
+    },
     "StackTrace":{
       "type":"string",
       "max":16384