help: how to write a custom tool function?

[pigparadise]

1. when use server mode, in tools/list , the description is fixed, only use the agent name, like "Send a message to the {agent_name} agent"
2. i find all the demos are agent, but don't find a way to write a custom tool function. do i need to write a new AgentMCPServer?

[evalstate]

Hi @pigparadise -- for the moment that's the easiest way (it's not usually too bad - i use them in e2e tests etc: https://github.com/evalstate/fast-agent/blob/main/tests/e2e/smoke/test_server.py)

Having thought on this for a bit (and not wanting too much complexity) I do plan (or would love a PR for) to copy the Anthropic quickstart Tool definition (https://github.com/anthropics/anthropic-quickstarts/tree/main/agents) as a good way to offer this functionality.

[pigparadise]

it works，thank you！