> ## 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 Config • Rust AI Agent SDK
> GuardrailConfig: Configuration for guardrails.
# GuardrailConfig
> Defined in the [**guardrails**](../modules/guardrails) module.
Rust AI Agent SDK
Configuration for guardrails.
## Fields
| Name | Type | Description |
| ------------------- | ---------------------- | --------------------------------------- |
| `on_failure` | `GuardrailAction` | Action to take on failure |
| `max_retries` | `usize` | Maximum retries if action is Retry |
| `fallback_response` | `Option<String>` | Fallback response if action is Fallback |
| `log_results` | `bool` | Whether to log validation results |
| `error_template` | `Option<String>` | Custom error message template |
## Methods
### `new`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn new() -> Self
```
Create new config
### `on_failure`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn on_failure(mut self, action: GuardrailAction) -> Self
```
Set failure action
**Parameters:**
| Name | Type |
| -------- | ----------------- |
| `action` | `GuardrailAction` |
### `max_retries`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn max_retries(mut self, retries: usize) -> Self
```
Set max retries
**Parameters:**
| Name | Type |
| --------- | ------- |
| `retries` | `usize` |
### `fallback_response`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn fallback_response(mut self, response: impl Into) -> Self
```
Set fallback response
**Parameters:**
| Name | Type |
| ---------- | ------------------------- |
| `response` | `impl Into<String>` |
### `log_results`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn log_results(mut self, log: bool) -> Self
```
Set log results
**Parameters:**
| Name | Type |
| ----- | ------ |
| `log` | `bool` |
### `error_template`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn error_template(mut self, template: impl Into) -> Self
```
Set error template
**Parameters:**
| Name | Type |
| ---------- | ------------------------- |
| `template` | `impl Into<String>` |
## Source
`praisonai/src/guardrails/mod.rs` at line 199
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