> ## 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.
# Guardrail Chain • Rust AI Agent SDK
> GuardrailChain: Chain of guardrails to run in sequence.
# GuardrailChain
> Defined in the [**guardrails**](../modules/guardrails) module.
Rust AI Agent SDK
Chain of guardrails to run in sequence.
## Fields
| Name | Type | Description |
| ------------ | ------------------------------------- | ----------- |
| `guardrails` | `Vec<Box<dyn Guardrail>>` | - |
| `config` | `GuardrailConfig` | - |
## Methods
### `new`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn new() -> Self
```
Create a new guardrail chain
### `add`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn add(mut self, guardrail: impl Guardrail + 'static) -> Self
```
Add a guardrail to the chain
**Parameters:**
| Name | Type |
| ----------- | -------------------------- |
| `guardrail` | `impl Guardrail + 'static` |
### `config`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn config(mut self, config: GuardrailConfig) -> Self
```
Set config
**Parameters:**
| Name | Type |
| -------- | ----------------- |
| `config` | `GuardrailConfig` |
### `validate`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn validate(&self, output: &str) -> GuardrailResult
```
Validate output through all guardrails
**Parameters:**
| Name | Type |
| -------- | ------ |
| `output` | `&str` |
### `len`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn len(&self) -> usize
```
Get guardrail count
### `is_empty`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn is_empty(&self) -> bool
```
Check if empty
## Source
`praisonai/src/guardrails/mod.rs` at line 479
***
## Related Documentation