# Evaluation set

Glossary · Agents

Canonical page: https://datasdk.ai/glossary/evaluation-set

An evaluation set is a collection of examples used to check how a system performs.

## Why it matters

Find repeatable failures before putting an automated workflow in front of users.

## Illustrative example

A team tests an agent on complete, missing-field, ambiguous, and unmatched records.

## What to check

Good results on test examples do not guarantee performance on every future case.

## How Data SDK fits

Data SDK connects website visits with available company details worldwide, from startups to larger businesses. Coverage and fields vary. Start free trial opens an email request; terms are confirmed with the team. The full API is coming soon.

These are suggested workflows, not a list of built-in integrations. Use your own approved analytics, CRM, and research process where needed. Matches and fields vary. A company match does not identify a person or prove buying intent.

## Related reading

- [Test an agent against difficult company records](https://datasdk.ai/use-cases/test-an-agent-against-difficult-company-records): Plan an evaluation that catches invented facts and unsafe actions.
- [Tool call](https://datasdk.ai/glossary/tool-call): A tool call is an agent's request to another function or service for an action or information.
- [Grounding](https://datasdk.ai/glossary/grounding): Grounding connects a generated answer to evidence the system can inspect.
- [Hallucination](https://datasdk.ai/glossary/hallucination): A hallucination is model-generated content that is unsupported or incorrect.
- [Human review](https://datasdk.ai/glossary/human-review): Human review puts a person in the loop before a result is accepted or acted on.
- [Research brief](https://datasdk.ai/glossary/research-brief): A research brief is a compact explanation of a company and why it may be relevant.

[Glossary](https://datasdk.ai/glossary) · [Use cases](https://datasdk.ai/use-cases) · [Comparisons](https://datasdk.ai/vs) · [For businesses](https://datasdk.ai/for-businesses) · [For builders](https://datasdk.ai/for-builders)