Lesson 2: Serving the returns desk tools over MCP
34 min read·13 Oct 2026
Module 4 · Lesson 2 · About 60 minutes · Needs: Lesson 1 (hosts, clients, servers, primitives) and Module 3 (the eight tools)
The situation
It is Monday 11 May 2026, week 5. The eight tools work, but only inside your agent. Priya's team wants a help-centre assistant that looks up orders too, and Dev wants one copy of every rule. "Serve them once," he says, "through our own MCP server."
Sam adds a condition: "When Mei asks about Aisha's vacuum, the server says no, whatever the agent was told." You trace Aisha's R-1001 the whole way: the RoboSweep X2, order 5521, $129.00.