# Workflow Builder
<a name="workflow-builder-overview"></a>

Workflow Builder enables multi-agent orchestration by creating a supervisor agent that delegates work to specialized Agent Builder agents. Each workflow consists of:
+  **Supervisor Agent**: The entrypoint agent that receives user requests and coordinates specialized agents
+  **Specialized Agents**: Agent Builder use cases that the supervisor can delegate tasks to
+  **Agents as Tools Pattern**: The supervisor registers each Agent Builder agent as a tool and autonomously selects which agents to use


| Feature | Agent Builder | Workflow Builder | 
| --- | --- | --- | 
|   **Purpose**   |  Build and deploy single custom agents  |  Orchestrate multiple Agent Builder agents  | 
|   **Agent Type**   |  Single agent with MCP tools  |  Supervisor agent \$1 multiple Agent Builder agents  | 
|   **Tool Integration**   |  MCP servers and Strands tools  |  Agent Builder agents registered as tools  | 
|   **Delegation**   |  Direct tool invocation  |  Autonomous agent selection and delegation  | 
|   **Complexity**   |  Single-agent tasks  |  Multi-step, multi-agent workflows  | 
|   **Agent Reuse**   |  N/A  |  Reuses existing Agent Builder deployments  | 
|   **Best for**   |  Focused, single-domain tasks  |  Complex workflows requiring multiple specializations  | 

**Note**  
Workflows require at least 1 Agent Builder use case as a specialized agent agent
All specialized agents must be Agent Builder use cases deployed in GAAB