AWS re:Invent 2025 - Build an Agent Factory: An Agent that can Create any Agent On-Demand (SMB309)

Building an Agent Factory: Creating Agents On-Demand

Key Concepts

• AI Agents: Agents that run a loop with a model and tools to take actions and achieve goals.
• Strands SDK: An open-source framework used to easily create agents with just a few lines of code.
• Model Context Protocol (MCP): Provides a common language for agents, tools, and data sources to communicate.
• Agent-to-Agent (A2A) Communication: Allows agents to discover, understand capabilities, and communicate with each other.
• Agent Core: A purpose-built service for running agent systems at scale securely and efficiently.

Agent Factory Architecture

• Builder Agent: The core of the agent factory, responsible for taking user requests and creating single agents or multi-agent systems on-demand.
• Agent Core Integration: The agent factory leverages Agent Core to provide a secure, scalable, and operationally efficient runtime for the agents it creates.
  • Identity: Ensures only authorized users and agents can access the system.
  • Memory: Provides short-term and long-term memory for agents.
  • Code Interpreter: Allows agents to write and execute their own code.
  • Browser Tool: Provides a secure environment for agents to browse the internet and interact with web forms.
  • Gateway: Exposes existing Lambda functions and APIs as MCP tools for agents to use.
  • Observability: Provides visibility into agent actions and behavior for troubleshooting and analysis.

Demonstration

1. Simple Chatbot: Showed how easy it is to create agents using the Strands SDK, with the ability to switch between different language models.
2. Web Scraping and Reporting Agent: Demonstrated an agent that can browse the internet, find the latest AWS news, and generate a report to upload to an S3 bucket.
3. Meta-Tooling Agent: Illustrated an agent that can dynamically create new tools (Python functions) and make them available to other agents.
4. MCP-Enabled Agent: Showcased an agent that can interact with MCP servers to access documentation and calculate the total cost of ownership for hosting a static website on AWS.
5. Multi-Agent System: Presented a system with an HR agent, an employee agent, and an MCP server, working together to find employees with the right skills for a machine learning project.
6. Agent Factory in Action: Demonstrated the builder agent creating and deploying agents on-demand, including a risk analysis agent and an expense reporting agent, all without writing extensive code.

Key Takeaways

• The agent factory provides a streamlined way to create and deploy agents on-demand, without the need for extensive coding and configuration.
• Strands SDK, MCP, and A2A protocols enable the creation of powerful, flexible, and collaborative agent systems.
• Agent Core offers a secure, scalable, and operationally efficient runtime for running agent-based applications in production.
• The agent factory can dynamically create and deploy agents with custom tools and business logic, tailored to specific user requirements.
• Multi-agent systems can be easily constructed, where agents with different capabilities can work together to achieve complex goals.

Business Impact

• The agent factory allows organizations to quickly build and deploy agents to automate a wide range of business tasks, from risk analysis to expense reporting.
• By abstracting away the complexity of agent creation and deployment, the agent factory empowers business users to request and utilize custom agents without the need for extensive technical expertise.
• The ability to create multi-agent systems enables the development of more sophisticated and collaborative solutions, addressing complex business challenges.
• The secure and scalable nature of Agent Core ensures that agent-based applications can be reliably deployed and operated in production environments.

Real-World Applications

• Financial Services: Agents for risk analysis, portfolio optimization, and regulatory compliance.
• Human Resources: Agents for employee onboarding, leave management, and talent acquisition.
• Sales and Marketing: Agents for lead generation, customer engagement, and campaign optimization.
• IT Operations: Agents for infrastructure monitoring, incident response, and automated remediation.
• Supply Chain Management: Agents for inventory optimization, logistics planning, and supplier management.