Can't run operation with List parameter

[seanliu-oss]

I've been trying to run an operation with parameter of type List.
$>bean org.springframework.boot:name=Metrics,type=Endpoint

#bean is set to org.springframework.boot:name=Metrics,type=Endpoint
$>info
#mbean = org.springframework.boot:name=Metrics,type=Endpoint
#class name = org.springframework.boot.actuate.endpoint.jmx.EndpointMBean
#there is no attribute

operations

%0 - java.util.Map listNames()
%1 - java.util.Map metric(java.lang.String requiredMetricName,java.util.List tag)
#there's no notifications
$>run listNames
#calling operation listNames of mbean org.springframework.boot:name=Metrics,type=Endpoint with params []
#operation returns:
{
names = ( application.ready.time, application.started.time, disk.free, disk.total, executor.active, executor.completed, executor.pool.core, executor.pool.max, executor.pool.size, executor.queue.remaining, executor.queued, hikaricp.connections, hikaricp.connections.acquire, hikaricp.connections.active, hikaricp.connections.creation, hikaricp.connections.idle, hikaricp.connections.max, hikaricp.connections.min, hikaricp.connections.pending, hikaricp.connections.timeout, hikaricp.connections.usage, jdbc.connections.max, jdbc.connections.min, jvm.buffer.count, jvm.buffer.memory.used, jvm.buffer.total.capacity, jvm.classes.loaded, jvm.classes.unloaded, jvm.gc.live.data.size, jvm.gc.max.data.size, jvm.gc.memory.allocated, jvm.gc.memory.promoted, jvm.gc.overhead, jvm.gc.pause, jvm.memory.committed, jvm.memory.max, jvm.memory.usage.after.gc, jvm.memory.used, jvm.threads.daemon, jvm.threads.live, jvm.threads.peak, jvm.threads.states, logback.events, mongodb.driver.pool.checkedout, mongodb.driver.pool.size, mongodb.driver.pool.waitqueuesize, process.cpu.usage, process.files.max, process.files.open, process.start.time, process.uptime, rabbitmq.acknowledged, rabbitmq.acknowledged_published, rabbitmq.channels, rabbitmq.connections, rabbitmq.consumed, rabbitmq.failed_to_publish, rabbitmq.not_acknowledged_published, rabbitmq.published, rabbitmq.rejected, rabbitmq.unrouted_published, spring.data.repository.invocations, system.cpu.count, system.cpu.usage, system.load.average.1m, tomcat.sessions.active.current, tomcat.sessions.active.max, tomcat.sessions.alive.max, tomcat.sessions.created, tomcat.sessions.expired, tomcat.sessions.rejected );
}

I've tried following and none of them works:
$>run metric application.ready.time \[\]
#ConversionException: Default conversion to List failed.
$>run metric application.ready.time []
#ConversionException: Default conversion to List failed.
$>run metric application.ready.time
#IllegalArgumentException: Operation metric with 1 parameters doesn't exist in bean org.springframework.boot:name=Metrics,type=Endpoint
$>run metric application.ready.time {}
#ConversionException: Default conversion to List failed.
$>run metric application.ready.time \{\}
#ConversionException: Default conversion to List failed.

How do I invoke the operation?