Connecting Agents to the Real World: Tools, Integrations and MCP in Practice

Connecting Agents to the Real World: Tools, Integrations and MCP in Practice

Agentic AI in Practice · Book 2

An AI agent is only as useful as what it can reach. A smart model that can’t look up an order, read a file or send a message is still just a chatbot. And an agent with careless access to your systems is a risk.

This book shows you how to connect AI agents to real tools, data and apps so they can do real work, safely. It’s written in plain language, with diagrams, worked examples and an exercise at the end of every chapter.

What you’ll learn

• How to design tools agents use well: clear names, simple inputs, focused results and error messages that help the agent recover.
• How to keep risky actions safe: rate every action by risk, add approval steps, and make retries safe so nothing happens twice.
• How to feed agents the right data: search-then-fetch, paging and summaries, so the agent isn’t buried in information.
• The Model Context Protocol (MCP), from zero to server: what it is, how it works, and how to design your own server. Covers the current 2026-07-28 version.
• Sign-in and permissions: OAuth, scopes and the rules that stop one user’s access from leaking to another.
• Long tasks and rich interfaces: MCP Tasks for slow jobs, and MCP Apps for forms and charts inside the chat.
• Security: prompt injection, poisoned tools, and the “dangerous combination” behind most agent data leaks, plus how to break it.
• Testing and monitoring: prove your safety promises, catch the moment a connected app changes, and keep agents reliable over time.
• A full case study: a real content-and-sales system connected end to end, with Instagram DMs, an online shop, an email list and a sales sheet.

Inside

• 12 chapters in 3 parts
• 11 architecture diagrams
• 12 hands-on exercises
• 5 appendices: a tool design checklist, an MCP server design canvas, a server trust checklist, an “MCP in 2026” summary, and a glossary
• About 80 pages, in PDF and Word

Who it’s for: founders, creators, small teams, and anyone building or buying AI agents for their business. No advanced coding is needed.

It’s the second book in the Agentic AI in Practice series. You can read it on its own, and it pairs well with Agentic Architecture in Practice.

Kept up to date: the book follows MCP version 2026-07-28. When the book is updated, you get the new version through your original download link.