> ## 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.
# Add Tool • AI Agent SDK
> add_tool: Add a tool to the allowlist.
# add\_tool
Method
> This is a method of the [**PermissionAllowlist**](../classes/PermissionAllowlist) class in the [**approval**](../modules/approval) module.
Add a tool to the allowlist.
```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 LR
agent["Agent"] -- "uses" --> tool["Tool: add_tool"]
tool -- "returns" --> result["Result"]
style tool fill:#189AB4,color:#fff
style agent fill:#8B0000,color:#fff
style result fill:#8B0000,color:#fff
```
## Signature
```python theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
def add_tool(tool_name: str, paths: Optional[List[str]], session_only: bool) -> None
```
## Parameters
Name of the tool to allow
Optional list of allowed paths (empty = all paths)
If True, permission expires with session
## Uses
* `ToolPermission`
* `add`
## Used By
* [`PermissionAllowlist.load`](../functions/PermissionAllowlist-load)
## Source
`praisonaiagents/approval.py` at line 96
***
## Related Documentation