What is the quickest way to test how an agent behaves before writing an application?
Why D is the answer
Use the Foundry portal
You can create and test a single agent in the portal, then build a client later.
In detail
- The Foundry portal lets you test an agent straight away.
- Test with real questions, including hard ones.
Use case
An illustrative scenario, not a real incident.
Before building an app, a team tries its agent in the Foundry portal with real questions, and adjusts the instructions.
See it in different ways
sequenceDiagram participant U as User participant A as Agent participant T as Tool U->>A: Request A->>T: Uses a tool, such as file search T-->>A: Result A-->>U: Answer or completed action
flowchart LR S0["Create agent"] --> S1["Try real questions"] --> S2["Adjust instructions"] --> S3["Build the app"]
Key point: Test agents in the portal first.
Why the other options are wrong
- A. Write a mobile app first, then publish it to a store
- A published app is a long way round.
- B. Train a new model on your conversations
- Training a model is not needed to test an agent.
- C. Ask users to test it in production first
- Production users should not be the first testers.

