Changes to List one of your own agents under a handle [write]

added the optional property agent/default_model to the response with the 201 status

added the optional property agent/installed to the response with the 201 status

added the optional property agent/stats/usage to the response with the 201 status

added the optional property error/request_id to the response with the default status

added the required property agent/conformance to the response with the 201 status

added the required property agent/seller to the response with the 201 status