Hi Team - Is the ECS Task basically the agent listening to the work queue?

The ECStask is used to run the flow through in an ECS cluster, i.e. it's essentially defining the actual execution environment for the flow https://prefecthq.github.io/prefect-aws/ecs/#prefect_aws.ecs.ECSTask. The Agent Serves a fundamentally different role as it's job is simply to poll for and submit work from a work-queue and propose state transitions for a flow run as it is executing the logic for which is all handled server side through the api this is a good resource to check out for agents/work queues https://discourse.prefect.io/t/agents-and-work-queues-faq/1468