How Agent Skills and MCP Servers Work Together

Introduction

Claude introduced Skills and the Model Context Protocol (MCP) to simplify function calling and provide agents with procedural knowledge. MCP standardizes tool access, while Skills act as a manual that tells Claude how to use those tools effectively.

Understanding Skills and MCP

Think of MCP as the key that opens the shelves of a hardware store, and Skills as the helpful clerk who knows which items to pick and how to use them. MCP grants Claude permission to reach external systems; Skills supply the context and step‑by‑step instructions needed after access is granted.

Advantages of Combining Skills and MCP

Clear discovery: Skills encode which sources are relevant for each task, so Claude no longer guesses where to look.

Reliable orchestration: Skills define the exact order of multi‑step workflows, ensuring predictable execution.

Consistent performance: Skills enforce output format, detail level, and tone, matching team standards.

The separation makes the architecture composable: a single Skill can orchestrate multiple MCP servers, and an MCP server can serve dozens of Skills. Updating a Skill instantly benefits all connected tools.

Potential Overlap

MCP servers may contain tool‑specific prompts, but these should remain generic. Skills focus on applying those tools within particular processes. Conflicts can arise—for example, if an MCP server returns JSON while a Skill expects Markdown—so it is best to let MCP handle connectivity and Skills handle presentation and workflow logic.

Practical Use Cases

Case 1: Financial Analyst – Automated Company Valuation

Skill: Automates comparable‑company analysis, extracting data from multiple sources, applying a consistent valuation method, and formatting results to compliance standards.

MCP server: Connects to S&P Capital IQ, Daloopa, and Morningstar for real‑time market data.

Discovery – Skill identifies required data sources.

Connection – MCP fetches real‑time financial data.

Orchestration – Skill applies the valuation methodology and formats the output.

Verification – Skill validates the result against compliance rules.

Case 2: Meeting Preparation – Notion “Smart Meeting” Skill

Skill: Defines which Notion pages to search, how to build the pre‑read material and agenda, and the required sections.

MCP server: Provides Notion access for searching, reading, and creating pages.

Discovery – Skill selects relevant pages (project docs, past meetings, stakeholder info).

Connection – MCP retrieves the content from Notion.

Orchestration – Skill assembles a pre‑read document and an agenda.

Performance – MCP saves both documents back to Notion and links them.

Quality – Skill ensures the output follows team formatting and content standards.

When to Use Skills vs. MCP

Skills capture procedural knowledge that would otherwise need to be re‑explained each time a new team member joins. They are ideal for multi‑step workflows, processes requiring strict consistency, codifying domain expertise, and preserving knowledge after turnover.

MCP servers extend Claude’s reach to external data and actions. Use MCP when you need real‑time access to services (Notion, Slack, databases), to perform operations (create GitHub issues, send notifications), to read/write files, or to integrate APIs not natively supported by Claude.

Rule of thumb: if you are describing *how* to do something, that is a Skill; if you need Claude to *access* something, that is MCP.

Quick Reference

Nature: Skills – procedural knowledge; MCP – tool connectivity.

Role: Skills teach Claude *how* to act; MCP gives Claude *access*.

Loading: Skills load on demand; MCP connections stay available once established.

Contents: Skills contain commands, scripts, templates; MCP contains tools, resources, prompts.

Token behavior: Skills keep context when loaded; MCP defines pre‑loaded resources.

Best use: Skills for workflows, standards, methodology; MCP for data access, API calls, external actions.

FAQ

Will Skills replace MCP?

No. They solve different problems: MCP provides connectivity, Skills provide procedural guidance. The most powerful workflows combine both.

Can a Skill use multiple MCP servers?

Yes. A single Skill can coordinate several MCP servers, e.g., pulling internal research from Google Drive, code from GitHub, and market data from web searches.

Can one MCP server support multiple Skills?

Yes. A single MCP connection can be leveraged by many Skills, such as Notion powering meeting preparation, research, knowledge capture, and implementation guidance.

Conclusion

The author notes a pause in updates due to health reasons but promises faster updates on Agent architecture in the future.