
The Technical Limits of MCP: Missing Authentication, Tool Sprawl, and Stateful Connections
The Model Context Protocol makes authentication optional by design — only ~8.5% of MCP servers use OAuth, while tool sprawl taxes every context window.
The Model Context Protocol is an open standard, created by Anthropic, that lets AI assistants connect to external tools, data sources, and APIs through one shared interface.
Instead of building a custom integration for every service, developers expose capabilities once and any compatible AI tool can use them. Also known as: MCP
What this topic covers
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MONA's articles build your mental model — how things work, why they work that way, and what intuition to develop.
Concepts covered

The Model Context Protocol makes authentication optional by design — only ~8.5% of MCP servers use OAuth, while tool sprawl taxes every context window.

The Model Context Protocol (MCP) is an open standard from Anthropic that connects AI applications to external tools, data, and APIs over JSON-RPC 2.0.

The Model Context Protocol links AI apps to external tools through three roles — host, client, server — over JSON-RPC, one client per server connection.
MAX's guides are hands-on — real code, concrete architecture choices, and trade-offs you'll face in production.
Tools & techniques

An MCP server exposes tools, resources, and prompts to AI clients over stdio or Streamable HTTP. Build one with the official TypeScript or Python SDK.
DAN tracks how this domain is evolving — which models, techniques, and benchmarks are reshaping 2026.
Models & benchmarks
Updated May 2026

MCP and Google's A2A both landed under the Linux Foundation in 2025, with native support in ChatGPT, Gemini, and AWS. The real 2026 fight is security.
ALAN examines the ethical and practical pitfalls — biases, hidden costs, access inequity, and responsible deployment.
Risks & metrics

Third-party MCP servers run with your model's access, but most registries publish them without review — verification confirms identity, not safety.