Source-backed field notes on MCP, RAG and agent data infrastructure.https://spyn3.com/resources/2026-09-13T12:00:00ZSPYN3https://spyn3.com/about/https://spyn3.com/resources/mcp-2026-stateless-spec/2026-09-13T12:00:00Z

What the July MCP specification changes for remote servers, authorization and scaling.

https://spyn3.com/resources/what-is-model-context-protocol/2026-09-13T12:00:00Z

A plain-language explanation of MCP clients, servers, tools and resources.

https://spyn3.com/resources/mcp-vs-rag-vs-api/2026-09-13T12:00:00Z

A decision guide to three layers that solve different architecture problems.

https://spyn3.com/resources/mcp-security-checklist/2026-09-13T12:00:00Z

A practical review for permissions, credentials, tool risk and observability.

https://spyn3.com/resources/one-mcp-server-per-workspace/2026-09-13T12:00:00Z

Why a small governed surface is more useful than exposing every connector separately.

https://spyn3.com/resources/mcp-authorization-2026/2026-09-13T12:00:00Z

A practical guide to MCP authorization in 2026: issuer validation, issuer-bound credentials, client registration changes and migration priorities.

https://spyn3.com/resources/chatgpt-custom-mcp-connectors/2026-09-13T12:00:00Z

What builders need to know about ChatGPT custom MCP connectors, developer mode, tool safety, administration and production-ready data access.

https://spyn3.com/resources/official-mcp-registry-guide/2026-09-13T12:00:00Z

Understand the official MCP Registry, what server metadata can solve, what discovery cannot guarantee and how builders should prepare for distribution.

https://spyn3.com/resources/a2a-vs-mcp/2026-09-13T12:00:00Z

A2A and MCP are complementary agent protocols. Compare agent-to-agent coordination with tool and context access, plus an architecture using both.

https://spyn3.com/resources/connect-business-data-to-ai-agent/2026-09-13T12:00:00Z

A step-by-step architecture for connecting files, websites and databases to an AI agent with retrieval, permissions, citations and MCP or REST.

https://spyn3.com/resources/evaluate-rag-retrieval/2026-09-13T12:00:00Z

Evaluate RAG retrieval with representative questions, relevance judgments, recall, precision, ranking checks and failure analysis before generation.

https://spyn3.com/resources/design-mcp-tools-for-agents/2026-09-13T12:00:00Z

Design MCP tools agents can choose and use reliably with clear names, bounded inputs, compact outputs, errors, risk hints and task-based evaluations.

https://spyn3.com/resources/reduce-agent-tool-response-tokens/2026-09-13T12:00:00Z

Reduce agent tool-response tokens with projection, pagination, snippets, progressive disclosure, structured formats and response budgets.

https://spyn3.com/resources/build-source-aware-ai-answers/2026-09-13T12:00:00Z

Build source-aware AI answers by preserving provenance through ingestion, retrieval and generation, then validating citations against returned evidence.

https://spyn3.com/resources/hybrid-search-vs-vector-search-rag/2026-09-13T12:00:00Z

Compare hybrid search and vector search for RAG: semantic similarity, exact-match retrieval, reciprocal-rank fusion and evaluation criteria.

https://spyn3.com/resources/rag-chunk-size/2026-09-13T12:00:00Z

RAG chunk size affects retrieval precision, context completeness and cost. Review current evidence and run a corpus-specific chunking experiment.

https://spyn3.com/resources/metadata-filtering-enterprise-rag/2026-09-13T12:00:00Z

Metadata filtering narrows enterprise RAG by workspace, permission, source, time and document type before ranking. Learn the architecture and pitfalls.

https://spyn3.com/resources/prompt-injection-connected-data/2026-09-13T12:00:00Z

Understand indirect prompt injection in documents, websites and connected data, plus layered defenses for retrieval systems and tool-using agents.

https://spyn3.com/resources/mcp-vs-function-calling/2026-09-13T12:00:00Z

Compare MCP and function calling: protocol portability, local tool definitions, discovery, authentication and when a product should support both.

https://spyn3.com/resources/build-vs-buy-mcp-server/2026-09-13T12:00:00Z

Decide whether to build or buy an MCP server by comparing differentiation, source breadth, authorization, operations, evaluation and total cost.

https://spyn3.com/resources/remote-vs-local-mcp-server/2026-09-13T12:00:00Z

Compare remote and local MCP servers for deployment, authentication, updates, latency, data access and multi-user governance.

https://spyn3.com/resources/agent-memory-vs-rag/2026-09-13T12:00:00Z

Agent memory and RAG solve different context problems. Compare conversation state, durable user facts, knowledge retrieval and safe storage design.

https://spyn3.com/resources/mcp-tool-design-worksheet/2026-09-13T12:00:00Z

A reusable MCP tool design worksheet for purpose, naming, input schema, output budget, permissions, risks, errors and evaluations.

https://spyn3.com/resources/rag-evaluation-scorecard/2026-09-13T12:00:00Z

A reusable RAG evaluation scorecard for retrieval relevance, evidence coverage, faithfulness, answer quality, permissions, latency and cost.

https://spyn3.com/resources/ai-data-connector-requirements-checklist/2026-09-13T12:00:00Z

Evaluate an AI data connector for ingestion, permissions, freshness, retrieval, citations, MCP, operations, security and portability.