In plain English, an agent orchestration platform coordinates who or what should do a piece of machine-assisted work, with which context and tools, under whose authority, and how the result is reviewed and recorded. It may direct a single agent, several specialist agents, deterministic workflow steps, human approvals, and external systems in one run. The platform is responsible for preserving enough state and lineage that an operator can see the objective, decisions, actions, exceptions, and terminal disposition. Its value is not the number of agents on a diagram; it is the ability to make distributed execution bounded and intelligible.
A complete evaluation follows the lifecycle before, during, and after execution. Before work, the platform needs intake, scope, identity, policy, entitlement, data classification, budget, capacity, and route decisions. During work, it needs scheduling, tool controls, checkpoints, retries, cancellation, escalation, and telemetry. After work, it needs acceptance, evidence, economic reconciliation, learning, retention, and review. Products vary widely. Some provide only runtime coordination, some focus on developer deployment, and others connect organization-wide work and governance. Buyers should state which lifecycle they require rather than assuming the category label guarantees coverage.
The platform can sit above agent frameworks, model providers, workflow engines, data systems, and business applications without replacing all of them. Frameworks may supply code-level agent primitives. Business systems remain authorities for customer, financial, operational, or legal records. Identity providers govern access. Models provide inference. The orchestration layer coordinates these boundaries through explicit contracts and references. A responsible architecture avoids copying every source into a new control plane or allowing an agent conversation to become an unofficial system of record.