> ## 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.
# Has Hook • AI Agent SDK
> has_hook: Check if any hooks are registered for an event. Simplified API.
# has\_hook
Function
> This function is defined in the [**registry**](../modules/registry) module.
Check if any hooks are registered for an event. Simplified API.
Accepts both string event names and HookEvent enums:
has\_hook('before\_tool') # String
has\_hook(HookEvent.BEFORE\_TOOL) # Enum
```mermaid theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
%%{init: {'theme': 'base', 'themeVariables': { 'primaryColor': '#8B0000', 'primaryTextColor': '#fff', 'primaryBorderColor': '#710101', 'lineColor': '#189AB4', 'secondaryColor': '#189AB4', 'tertiaryColor': '#fff' }}}%%
graph TD
event["Event Trigger"] --> hook["Hook: has_hook"]
hook --> decision{"Decision"}
decision -- "Allow" --> proc["Process"]
decision -- "Deny" --> block["Block"]
style hook fill:#189AB4,color:#fff
style event fill:#8B0000,color:#fff
style proc fill:#8B0000,color:#fff
style block fill:#8B0000,color:#fff
```
## Signature
```python theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
def has_hook(event: Union[str, HookEvent]) -> bool
```
## Parameters
Hook event name or HookEvent enum
### Returns
True if hooks are registered for this event
### Exceptions
If event string is not a valid HookEvent
## Uses
* `HookEvent`
* `ValueError`
* `has_hooks`
* `get_default_registry`
## Source
`praisonaiagents/hooks/registry.py` at line 416
***
## Related Documentation