> ## 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.
# To Tool Function • AI Agent SDK
> to_tool_function: Convert this handoff to a tool function that can be called by the LLM.
# to\_tool\_function
Method
> This is a method of the [**Handoff**](../classes/Handoff) class in the [**handoff**](../modules/handoff) module.
Convert this handoff to a tool function that can be called by the LLM.
```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: to_tool_function"]
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 to_tool_function(source_agent: 'Agent') -> Callable
```
## Parameters
The agent that will be using this handoff
### Returns
A callable function that performs the handoff
## Uses
* `time.time`
* `logger.info`
* `chat`
* `HandoffResult`
* `logger.error`
* `inspect.Parameter`
* `inspect.Signature`
## Source
`praisonaiagents/agent/handoff.py` at line 563
***
## Related Documentation