← Tool Garage
Connect station
MCP & agent tools
A standard way to hand an AI model real tools it can call.
1. Learn it
- A tool is a function with a description; the model decides when to call it.
- MCP is a shared format so the same tool works across different AI apps.
- The model does not run your code — it asks, your app runs it, and the result goes back.
- Dangerous tools need a confirmation step. Always.
Cost: Free; you pay for the model calls.
2. Practice it
Simulated — nothing real happensDecide what needs permission
Of these tools — search the docs, send an email, refund a payment, read today's schedule — mark which need human confirmation.
3. Connect it
Real — your own accountNothing to sign up for.
- 1Nothing to sign up for: tools are defined in your own app's code.
MessyDev never signs you up, spends your money, or touches your accounts. You do that part.
4. Use it
The moment your AI feature needs to do something, not just say something.
Honest alternatives
There is no single correct stack. Any of these would be a reasonable choice instead.
- Plain function calling without MCP
More in Connect
GitHubA save system for your code, with history and an undo that actually works.PostmanA place to poke an API by hand and see exactly what it sends back.n8nWire apps together with a flowchart instead of code.ZapierThe no-code version of the same idea, with thousands of ready connections.Slack & DiscordWhere your team and your first users talk — and a place your app can post updates to.TwilioSends text messages and makes phone calls from your code.