check method
Reads every property this type defines and returns what could not be read (missing required properties, wrong types), nested types included. Empty = the JSON matches the schema's shape for this type.
Implementation
@override
List<String> check() => [
...McpObject.$check(() => mimeType),
...McpObject.$check(() => sizes),
...McpObject.$check(() => src),
...McpObject.$check(() => theme),
];