What is an MCP tool?
An MCP tool is a small program that gives an AI assistant real abilities — like uploading a file, reading a database, or publishing an app build — through the Model Context Protocol (MCP), an open standard. Without a server, an assistant can only generate text. With one, it can take actions on your behalf when you ask in plain language.
The one-sentence version
MCP (Model Context Protocol) is a shared “language” that lets AI assistants talk to outside tools. An MCP tool is the piece on the tool's side that says “here are the things I can do” and then does them when the assistant asks.
A simple analogy
Think of your AI assistant as a smart new employee, and MCP tools as the apps you give them logins to. On their own they can advise you. Once you connect them to, say, your file storage or your app-distribution tool, they can actually do the work — move the file, send the link — because each tool exposes a small, well-defined set of actions.
What an MCP tool actually provides
- Tools — actions the assistant can call, each with a name and inputs (for example,
publish(file)oranalyze(file)). - Resources — data the assistant can read, like files or records.
- Prompts — optional ready-made instructions the tool suggests.
The assistant never has to know the tool's internal API. It just sees the list of tools and picks the right one from your request — that's the whole point of the standard.
Why it matters
Before MCP, every AI app needed a custom integration for every tool. MCP replaces that with one protocol, so a single server works across many assistants — Cursor, Claude, Codex, Copilot, Windsurf and Zed all speak it. Build (or install) once, use everywhere.
How you use one
You don't write code to use an MCP tool — only to build a new one. To use it you:
- Add the server to your editor's MCP config (a few lines of JSON), or simply ask your assistant to add it.
- Restart the editor so it loads the server.
- Prompt naturally — the assistant calls the server's tools when relevant.
A concrete example
IPALinked publishes an MCP tool called ipalinked-mcp. Once added, you can tell your assistant “share MyApp.ipa to IPALinked” and it uploads the build and returns a shareable install link — no dashboard, no CLI. Read the per-tool setup guide or the broader workflow for publishing builds from your editor.
Is it safe?
MCP tools run locally on your machine and can only perform the actions their tools define. As with any software, add servers from sources you trust and skim what actions they expose before granting access.