Create a tool that can handoff control to the requested agent.
The name of the agent to handoff control to, i.e. the name of the agent node in the multi-agent graph.
Agent names should be simple, clear and unique, preferably in snake_case,
although you are only limited to the names accepted by LangGraph
nodes as well as the tool names accepted by LLM providers
(the tool name will look like this: transfer_to_<agent_name>).
Optional name of the tool to use for the handoff.
If not provided, the tool name will be transfer_to_<agent_name>.
Optional description for the handoff tool.
If not provided, the tool description will be Ask agent <agent_name> for help.
