diff --git a/envoy/extensions/filters/http/json_to_metadata/v3/json_to_metadata.proto b/envoy/extensions/filters/http/json_to_metadata/v3/json_to_metadata.proto
index 97f59330..82bf67e2 100644
--- a/envoy/extensions/filters/http/json_to_metadata/v3/json_to_metadata.proto
+++ b/envoy/extensions/filters/http/json_to_metadata/v3/json_to_metadata.proto
@@ -89,7 +89,7 @@ message JsonToMetadata {
     // The value in the KeyValuePair must be set.
     KeyValuePair on_missing = 3;
 
-    // If the body is too large or fail to parse, apply this metadata KeyValuePair.
+    // If the body is too large or fail to parse or content-type is mismatched, apply this metadata KeyValuePair.
     //
     // The value in the KeyValuePair must be set.
     KeyValuePair on_error = 4;