> ## Documentation Index
> Fetch the complete documentation index at: https://praison.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# evaluate • AI Agent SDK

> evaluate: Return :attr:`LivenessDecision.REAP` iff the connection is stale.

# evaluate

<div className="flex items-center gap-2">
  <Badge color="purple">Method</Badge>
</div>

> This is a method of the [**LivenessPolicy**](../classes/LivenessPolicy) class in the [**protocols**](../modules/protocols) module.

Return :attr:`LivenessDecision.REAP` iff the connection is stale.

## Signature

```python theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
def evaluate(last_activity: float, now: float) -> LivenessDecision
```

## Parameters

<ParamField query="last_activity" type="float" required={true}>
  The connection's last-activity timestamp (same clock as `now` — the wrapper uses a monotonic clock).
</ParamField>

<ParamField query="now" type="float" required={true}>
  The current timestamp.
</ParamField>

### Returns

<ResponseField name="Returns" type="LivenessDecision">
  attr:`LivenessDecision.KEEP` while reaping is disabled or the
  connection is within its liveness window; otherwise
  :attr:`LivenessDecision.REAP`.
</ResponseField>

## Uses

* `reap_deadline`

## Source

<Card title="View on GitHub" icon="github" href="https://github.com/MervinPraison/PraisonAI/blob/main/src/praisonai-agents/praisonaiagents/gateway/protocols.py#L5327">
  `praisonaiagents/gateway/protocols.py` at line 5327
</Card>

***

## Related Documentation

<CardGroup cols={2}>
  <Card title="Evaluation Concept" icon="gavel" href="/docs/docs/concepts/evaluation" />

  <Card title="LLM as Judge" icon="scale-balanced" href="/docs/docs/features/llm-as-judge" />

  <Card title="Evaluation Loop" icon="rotate" href="/docs/docs/eval/evaluation-loop" />
</CardGroup>