> ## 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 Pressure • AI Agent SDK
> evaluate_pressure: Pure, deterministic classification of gateway load. No I/O.
# evaluate\_pressure
Function
> This function is defined in the [**protocols**](../modules/protocols) module.
Pure, deterministic classification of gateway load. No I/O.
Reads back facts the enforcement layer already computes
(`AdmissionGate.stats()`, the outbox `status` counts, the watchdog's
measured lag) and folds them into a single :class:`HealthPressure`. Lives
in core — like :func:`compute_config_revision` — so the SDK and the bot
classify identically without divergence.
Classification (highest wins):
* `"saturated"` — admission is full *and* work is queuing, the outbound
dead-letter tier is non-empty, or the event loop is lagging badly
(`>= 500 ms`): shed / stall is imminent or occurring.
* `"elevated"` — admission is highly utilised (`>= 80 %`), the inbound
or outbound backlog is building, or the loop is lagging (`>= 100 ms`).
* `"nominal"` — none of the above.
## Signature
```python theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
def evaluate_pressure() -> HealthPressure
```
### Returns
class:`HealthPressure` ready for the health surface.
## Uses
* `HealthPressure`
## Source
`praisonaiagents/gateway/protocols.py` at line 1269
***
## Related Documentation