Introduction
AI agents can handle specialized tasks independently, but complex enterprise workflows often require multiple agents to work together. One agent may interpret a request, another may retrieve authorized information, and a third may perform a specific business action.
The Agent2Agent (A2A) protocol provides a standardized way for compatible agents to discover capabilities and exchange requests and responses. Microsoft Foundry Agent Service supports connections to remote A2A endpoints, allowing agents to delegate work while maintaining authentication and access controls.
Key Takeaways
A2A makes communication between compatible AI agents possible, but communication alone does not provide governance. Enterprise multi-agent systems need clear agent identities, scoped permissions, defined responsibilities, output validation, tracing, and human approval for high-impact actions.
What We Learned
A2A Enables Specialized Agent Collaboration
A multi-agent architecture divides responsibilities among specialized agents instead of placing every capability inside one agent. For example, a coordinating agent can ask a policy agent to interpret a rule and a customer-data agent to retrieve authorized information.
How Microsoft Foundry A2A Works
A typical workflow follows these steps:
- A user or business workflow submits a goal.
- A coordinating agent determines which specialist is required.
- The specialist's capabilities are discovered through its agent card.
- The A2A connection authenticates the request.
- Endpoint access controls determine whether the request is allowed.
- The specialist completes its bounded task.
- The coordinating agent validates the result.
- Sensitive actions can be routed for human approval.
- Relevant events are recorded for monitoring and audit.
Four Governance Risks
Identity Gets Lost Between Agents
Organizations need to preserve user identity when individual permissions matter or use narrowly scoped service identities for appropriate service-to-service workflows.
Delegation Expands Access
Each agent and downstream service should independently enforce authorization rather than assuming that a delegated request is automatically permitted.
Agent Responses Are Treated as Facts
Important outputs should be validated against trusted sources, with structured response contracts and confirmation for high-impact actions where appropriate.
Failures Become Harder to Trace
Use correlation IDs, task-level traces, ownership, and logs to understand requests, authorization outcomes, errors, and actions across multiple agents.
Real-World Example
Consider an employee requesting access to a finance application. A coordinating agent can send the policy question to a policy agent while a directory agent checks the employee's role against an approved source. The coordinating agent combines the results and routes the request to a manager before provisioning begins.
No agent should automatically grant access simply because another agent requested it. Each step needs a defined purpose, appropriate identity, scoped permissions, and an auditable decision record.
When Should You Use A2A?
A2A is appropriate when:
- Specialist agents have distinct responsibilities.
- Agents need to collaborate across services or frameworks.
- Agent capabilities need to be reusable.
- Identity, permissions, monitoring, and task boundaries can be governed.
A simpler agent or conventional workflow may be better when one agent can reliably complete the task, the process is deterministic, or multi-agent coordination adds unnecessary latency and cost.
Recommended Production Approach
Start with one measurable workflow and a small number of specialist agents. Define each agent's responsibilities, input/output contracts, permitted tools, and escalation paths. Configure A2A authentication and least-privilege access, preserve user identity where required, and add tracing, validation, failure handling, and human approval before expanding the system.
Next Steps
Softree Technology helps organizations design governed AI workflows that connect agents with enterprise systems while addressing identity, access, validation, monitoring, and oversight requirements.
https://www.softreetechnology.com/
