We’ve covered everything:

what MCP is

tools, client, server

communication flow

guardrails

Now let’s put it all together and design a real system .

🎯 The Goal

Let’s build:

An AI-powered e-commerce assistant

Users should be able to:

view orders

search products

cancel orders

🧩 Step 1 — Identify Capabilities

Start with a simple question:

What should the system be able to do?

🔧 Tools (Actions)

get_user_orders(user_id, limit)

search_products(query)

cancel_order(order_id)

📚 Resources (Data)

user_profile

product_catalog

👉 This separation keeps things clean and predictable.

🧠 Step 2 — Design Tools Properly

Each tool should:

represent one action

have clear inputs

be easy for the model to understand

Example

get_user_orders(user_id, limit)

Enter fullscreen mode

Exit fullscreen mode

Another

cancel_order(order_id)

Enter fullscreen mode

Exit fullscreen mode

👉 No overloading, no ambiguity

🏗️ Step 3 — Build the MCP Server

This layer:

exposes tools

validates inputs

executes…