In one sentence: Skills teach AI "how to do something", while MCP lets AI "connect to what it needs". One is a capability pack, the other is a connector — and the two are often used together.
The most-used analogy: imagine AI as a newly hired employee — Skills are its onboarding training manual (teaching it how to do the job well), while MCP is its office connections (helping it plug in the printer, connect to the company database, and use system accounts).
A comparison table that says it all
| Skill (capability) | MCP (protocol) | |
|---|---|---|
| Essence | The manual + scripts + reference material that teach AI "how to do something" | The tool-connection standard that lets AI "connect to what it needs" |
| Metaphor | Onboarding manual, SOP workflow | USB-C port, universal adapter |
| Form | Text (SKILL.md) + scripts + attachments — pure files | A running server program that exposes tool/data interfaces |
| Problem it solves | "AI doesn't understand the professional practices in our field" | "AI can't reach my data and applications" |
| Who it's for | Even ordinary users can install: just copy a folder | Usually requires terminal config; more developer-oriented |
| Install difficulty | Low (copy a directory / one command) | Medium (needs command config, dependencies, environment) |
| Delivery form | GitHub repo / folder | Installable package (npx commands, etc.) + service config |
How do they work together?
This isn't an either-or relationship. A Skill's internals can absolutely call MCP tools:
A combined-punch example: MCP connects AI to your GitHub repo ("what it can connect to") → a "code review Skill" tells it which standards to review by and how to output the report ("how to do it") → layered together, AI can automatically do a professional round of code review for you.
Scenario check: which should you install now?
- want AI to work according to your industry standards (writing copy, doing design, writing weekly reports…)
- are in content operations, design, product management, or other non-pure-development roles
- want to get started quickly and accept simple installation like "copy a folder"
- want AI to operate your data and applications directly (connect GitHub, query databases, manage the browser)
- are a developer / engineer familiar with terminal config
- need AI to "get hands dirty doing work" rather than just "writing and talking"
For most people the optimal setup: Skills as the foundation + the MCP you need installed on demand.
Quick navigation
- What is a Skill: Skill explainer / 10 most worth installing / how to write your own
- What MCP is and how to configure it: MCP explainer / configuration tutorial / MCP FAQ