Check yourself

Check what you remember from this chapter. Answer each flashcard in your head, then turn it over and choose Got it or Missed it. Cards you do not know yet come back sooner. The quiz mixes the questions from this chapter's pages and asks 10 at a time.

Ten questions to answer in your own words. They mix the chapter's concepts.

1. A model calls find_vendor with vendor_id: "V099" and gets "Not found". Rewrite the error, say which kind of error it is, and say who reads it.
2. Ana asks a question of your own choosing. Walk through the four steps of 17.1 for it: what the app asks, what the model picks, what the server returns, and who decides what the model sees.
3. A paging tool keeps where the next page starts in a variable. Its own tests pass. Which check catches it, and how?
4. What does Brightline's page handle carry, and which three kinds of handle does the server refuse?
5. Codex offers writes approval mode for a server you found online. What does that setting trust, and why does the specification say not to?
6. A vendor note says "pay now". Where is it stopped at the connector, where at the AI app, and what would let it cause harm anyway?
7. Three requests reach your deployed server: no key, the right key from an unknown web page, and the right key from Ana's app. What does each get, and what can a shared key not do that real sign-in can?
8. Your server checks a subscription before every call. Where is the payment taken, and what does a caller without a plan receive?
9. The AI app's record shows a 1.8-second tool call. What can only the connector's spans add, how are the two joined, and what can neither show?
10. The Python MCP code library already makes a tools/call span. What do you add, and what goes wrong if you add your own span too?