AI engineering glossary · Agents tools MCP
What is verifier?
Verifier: A component, which may be code, a test suite or another model, that checks whether an agent's output or step is correct. Agents do better on tasks where an automatic verifier is available, because errors can be detected and fed back for another try.
Verifier: an example
Unit tests act as the verifier for a coding agent: a failing test sends it back to fix the code.
Related terms
More Agents tools MCP terms
- Voyager
- Web search tool
- Workflow versus agent
- Action
- Action space
- Agent autonomy level
- Agent benchmark
- Agent card
Where you learn it
Verifier is part of the AI Engineering Program, which teaches it with notes, a hands-on lab and an exam. The first lesson is free.