How to Identify Which Functions Were Executed in runWithTools?

Hi Cloudflare team,

I am using the `@hf/nousresearch/hermes-2-pro-mistral-7b` model with the `runWithTools` function and an array of `tools` (the `tools` object). I have the following question:

Is it possible to identify which functions within the `tools` array were actually executed by the model, if any?

For example:

```ts
const r = await runWithTools(ai, '@hf/nousresearch/hermes-2-pro-mistral-7b', {
messages: [.....],
tools: [....]
});

console.log(r.tool_calls)
```

I noticed that the constant `r` returns an object, but the `tool_calls` field in the response does not seem to include information about the executed functions. My specific questions are:

1. Under what circumstances does the `tool_calls` field in the response include relevant data?
2. Is there any explicit way to track which functions were called during the model's execution?

Thanks in advance for your help!