What is agent orchestration?
Call it orchestration and a vendor can charge for a router that would fit in twenty lines of code.
Agent orchestration
Multi-agent orchestration
Agent orchestration is the layer that decides which AI agent handles a task and what context it receives. It also decides how the result reaches the next step or the user, and it sits above the agents, not inside any one of them.
Three jobs make up orchestration. Routing picks which agent, or which tool, handles a given request. Context assembly decides what that agent actually sees: the conversation so far, retrieved documents, prior results from other agents. And result handling decides where the output goes next, whether that is another agent, a human reviewer, or the person who asked.
None of that requires more than one agent. A single agent with a search tool, a billing tool, and an email tool still does all three jobs on every turn. Orchestration describes the decisions, not the agent count.
Most "orchestration" is one prompt calling tools
Vendors sell orchestration as a product feature, and the word does a lot of unearned lifting. Strip the diagram down, and a lot of what gets that label is one model choosing between a handful of functions in one context window. That is tool calling. It is real engineering, but it is not what changes when you split work across separate agents.
Real orchestration earns its name when the parts genuinely need to be separate. Different instructions, different tools, different permissions, or a step that has to wait for a human to approve it. At that point something has to decide who goes next and what they are allowed to see.
We refuse the split more often than we build it. A thin prompt that answers vaguely does not get better by becoming three agents passing the same vague answer around. Get one agent measurably good at one job before you add a second.
- 01Routing without a real permission boundary is a switch statement wearing a bigger name.
- 02Context assembly is the part that breaks first: an agent given the wrong slice of history gives a confident wrong answer.
- 03Result handling has to include a place for a human to catch a bad join, or nobody catches it.
- ReceiveRequest arrives with its context.
- RouteDecide which agent or tool handles it.
- ScopeHand over only the context and tools that step needs.
- RunThe agent acts and returns a result.
- JoinCombine results, or hold for approval.
Teams build the first four stations without much trouble. The join is where an unowned mistake gets shipped.
Common questions
01Is agent orchestration the same as a multi-agent system?
No. A multi-agent system is the agents themselves. Orchestration is the layer that routes work between them. A single agent picking tools can still sit behind orchestration logic. A multi-agent system can exist with nothing actually governing its handoffs.
02Do I need an orchestration framework to do this?
Only once routing and context assembly get complex enough that hand-written code is hard to follow. A single agent choosing between three tools needs no framework at all. Several agents with shared state and conditional handoffs is where LangGraph earns its place, because it gives you a graph you can actually read back.
03What is the most common orchestration failure?
Losing the trace at the join. Each agent's own step looks fine on its own. The combined answer is wrong anyway, because nobody logged what each one was actually given before it acted. Decide what gets logged before launch, not after the first dispute.
04Can one agent orchestrate itself?
In a loose sense, yes. An agent picking which tool to call next is making a routing decision every turn. Most people mean something narrower: separate agents with separate permissions. A mistake in one needs the handoff record to explain it.
