JVM resource description doesn't match operation return value

[domain@localhost:9999 /] /server-group=main-server-group/jvm=default:read-resource
{
    "outcome" => "success",
    "result" => {
        "type" => undefined,
        "agent-lib" => undefined,
        "agent-path" => undefined,
        "env-classpath-ignored" => undefined,
        "environment-variables" => undefined,
        "heap-size" => "64m",
        "max-heap-size" => "512m",
        "java-agent" => undefined,
        "java-home" => undefined,
        "jvm-options" => undefined,
        "permgen-size" => undefined,
        "max-permgen-size" => undefined,
        "stack-size" => undefined
    },
    "compensating-operation" => undefined
}

[domain@localhost:9999 /] /server-group=main-server-group/jvm=default:read-resource-description
{
    "outcome" => "success",
    "result" => {
        "type" => OBJECT,
        "description" => "The JVM configuration for managed processes / servers.",
        "attributes" => {
            "agent-lib" => {
                "type" => STRING,
                "description" => "The JVM agent lib.",
                "access-type" => "read-write",
                "storage" => "configuration"
            },
            "agent-path" => {
                "type" => STRING,
                "description" => "The JVM agent path.",
                "access-type" => "read-write",
                "storage" => "configuration"
            },
            "env-classpath-ignored" => {
                "type" => BOOLEAN,
                "description" => "Ignore the environment classpath.",
                "access-type" => "read-write",
                "storage" => "configuration"
            },
            "environment-variables" => {
                "type" => LIST,
                "value-type" => UNDEFINED,
                "description" => "The JVM environment variables.",
                "access-type" => "read-write",
                "storage" => "configuration"
            },
            "java-agent" => {
                "type" => STRING,
                "description" => "The java agent.",
                "access-type" => "read-write",
                "storage" => "configuration"
            },
            "java-home" => {
                "type" => STRING,
                "description" => "The java home",
                "access-type" => "read-write",
                "storage" => "configuration"
            },
            "jvm-options" => {
                "type" => LIST,
                "value-type" => STRING,
                "description" => "The JVM options.",
                "access-type" => "read-only",
                "storage" => "configuration"
            },
            "stack-size" => {
                "type" => STRING,
                "description" => "The JVM stack size settings.",
                "access-type" => "read-write",
                "storage" => "configuration"
            },
            "type" => {
                "type" => STRING,
                "description" => "The JVM type can be either SUN or IBM",
                "access-type" => "read-only",
                "storage" => "configuration"
            }
        },
        "children" => {
            "heap-size" => {
                "type" => OBJECT,
                "description" => "The Heap size settings allocated by the JVM.",
                "attributes" => {
                    "size" => STRING,
                    "max-size" => STRING
                }
            },
            "permgen-size" => {
                "type" => OBJECT,
                "description" => "The JVM PermGen settings.",
                "attributes" => {
                    "size" => STRING,
                    "max-size" => STRING
                }
            }
        }
    },
    "compensating-operation" => undefined
}