# Model Context Protocol

Essays and notes tagged Model Context Protocol.

- [Inside an Architecture-as-Code platform: a C4 walkthrough](https://muthub.org/writing/inside-an-architecture-as-code-platform.md) (Jun 9, 2026): The open prototype at aac.muthub.org, described in its own notation and validated by its own rules. A level-by-level C4 walkthrough of the design decisions that mattered, and what I would change before an enterprise ran it.
- [Designing an enterprise MCP registry: the control point agents need](https://muthub.org/writing/designing-an-enterprise-mcp-registry.md) (Sep 18, 2025): As agents multiply, every enterprise needs an authoritative directory of the tools they can call. What a governed MCP registry must do, what the official registry leaves to you, and the mistakes to avoid.
- [Securing AI agents: identity, not secrets](https://muthub.org/writing/securing-ai-agents-identity-not-secrets.md) (May 29, 2025): Agents act on their own, at machine speed, across many systems. Static credentials and perimeter thinking don't hold up. Attested identity, explicit delegation and policy enforced outside the model do.
- [Adopting MCP in a bank: the four risks to solve first](https://muthub.org/writing/adopting-mcp-in-a-bank.md) (Apr 22, 2025): The Model Context Protocol standardizes how agents connect to tools and data. It is silent on whether they should. Four risk areas a regulated institution should resolve before agents get tools.
- [MCP in three primitives: tools, resources, prompts](https://muthub.org/writing/mcp-tools-resources-prompts.md) (Jun 18, 2025): MCP ended the copy-paste problem with three simple primitives. Being open is why it beat a thousand bespoke integrations.
- [Remote MCP, straight from the API](https://muthub.org/writing/mcp-connector-messages-api.md) (Jun 4, 2025): Direct remote MCP access through the Messages API removed a client layer and moved agent integration from clever hacks toward engineering.
- [A2A and MCP: complementary, not competing](https://muthub.org/writing/a2a-and-mcp.md) (May 1, 2025): MCP connects agents to tools; Agent2Agent connects agents to each other. Together they turn single agents into systems, and raise the governance stakes.
- [The MCP spec grows up](https://muthub.org/writing/the-mcp-spec-grows-up.md) (Apr 1, 2025): OAuth 2.1 authorization, streamable HTTP, batching and tool annotations: the March 2025 update that made enterprise MCP plausible.

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Muthukrishnan (Muthu) Bommiah · https://muthub.org · Views are my own and do not represent my employer.