All the raster analysis tools create new data. This new data is typically raster data but can also be feature data. These values are returned to you as a URL to an image service layer or a feature service layer.
URL to a raster service
When you specify the output of a task, the output will be an image service that is hosted in your organization. You set the output parameter to an image service name of your choosing. The new image service name must be unique and hasn't been used in your organization yet.
Raster output syntax
{
"serviceProperties": {"name": "newservicename"}
}