{"t0":"This is a pretend file address. No folder was created on your device.","t1":"You changed this page’s record only. It is not saved or sent anywhere.","t2":"This written example includes a pretend photo address. No request was sent.","t3":"This written example returns an error, not a photo address. The app could offer another breed or a retry.","t4":"The written answer rule can use only the notes you checked.","t5":"Your forecast selects a written next step. No model is making the choice.","t6":"Try an action to see whether it is allowed and whether any attempts remain.","t7":"Compare 4 and 5 workers. The extra helper adds coordination work without finishing a batch sooner. These are made-up units, not measured speed.","t8":"You changed what is being checked. The old pass no longer applies. Check again.","t9":"These are three connected, prewritten chapter plans. Change the secret keeper to see which chapters need another look.","t10":"The keeper is no longer Noor. Chapters 1 and 3 use the keeper’s name. Chapter 2 relies on chapter 1. Review the story connections as well as the changed names.","t11":"The loop stops at your chosen count; no audio plays.","t12":"Your chosen count stops the repeats. No music plays.","t13":"Closest under this map’s rules:","t14":"Equal distances keep the original note order.","t15":"Ties keep the starting order; nearby does not mean true.","t16":"A virtual path, not a folder created on your device.","t17":"Enter a whole-number age from 17 to 21.","t18":"The record has not been updated.","t19":"The record changes here only. Nothing is uploaded or saved.","t20":"Written success example. The response includes an illustrative photo address.","t21":"Written error example. No photo address was returned. Offer another breed or a retry.","t22":"Question: How old is Mira?\nSelection changed. Ask again to use these notes.","t23":"A previous answer does not apply to a changed selection.","t24":"Noor keeps the lighthouse secret.","t25":"Noor, according to the included secret note.","t26":"Not enough information in this context.","t27":"Only the selected notes are available to this fixed answering rule.","t28":"A written branching rule, not model planning.","t29":"Try one action to check both permission and remaining budget.","t30":"Compare 4 and 5 workers: a worker can add overhead without removing a batch. This is not a benchmark.","t31":"Inputs changed. Run the check again; any earlier pass is now stale.","t32":"Review needed: this chapter directly uses the keeper identity.","t33":"Review needed: this chapter depends on chapter 1, where the keeper changed.","t34":"Keeper changed from Noor. Chapters 1 and 3 use that fact directly; chapter 2 depends on chapter 1. Review the story, not just the substituted names.","t35":"Three connected, fixed outlines. Change the keeper to reveal the review dependencies.","t36":"Download requested: workshop-story.txt. Your browser controls where it is saved.","t37":"Download unavailable in this browser. You can copy your text instead.","t38":"The explicit correction supersedes the old age note.","t39":"Missing support remains unknown.","t40":"The answer uses the selected age note.","t41":"Counter reset to zero. Permission and budget settings are unchanged.","t42":"Download requested: story-blueprint.json. It contains your current names and three fixed outlines.","t43":"Download unavailable in this browser. Your outline remains visible on this page.","t44":"Experiment reset to its starting inputs. Your course check-ins are unchanged."}

The question to explore

Ask for a dog photo

What happens when a photo request works, or fails?

About 10 minutes / Suggested pace / No account needed

Tool
API
Response

Try the experiment

What this activity helps you do

Switch between a photo address and an error. Decide what the app can honestly show after each reply. Use the same check when an AI assistant says a tool succeeded.

Local teaching illustration / No AI model call

Choose Success: photo address returned.
Read the response, then choose Not found: unknown breed. Notice that no photo address comes back.
Explain why a program should show the error or offer a retry instead of claiming it found a photo.

HTTP 200
{ "status": "success", "message": "https://images.dog.ceo/breeds/beagle/example.jpg" }

Change a control to explore the example when JavaScript is enabled.

The idea

An API is a way for one program to ask another for something. A tool is a function an assistant or program can use. Calling an API is one possible tool action.

These replies are written examples, not live requests. One contains a pretend photo address; the other reports a missing breed. Read the reply before claiming success. The Dog lab makes a real request.

Take this with you

What changed?

A request is an attempt. Read the response to find out what actually happened.

Try explaining it.

Can an AI assistant honestly say it found a photo if its tool returned an error?

Open a possible explanation

No. It should explain the failure and offer a useful next step. A fluent answer cannot substitute for a missing result.

Choose what to try next

Keep exploring, or stay here and try another variation.