> Fetch clean Markdown by appending `.md` to any page URL under https://signalwire.com/docs or requesting it with the HTTP header `Accept: text/markdown`. The root index at https://signalwire.com/docs/llms.txt lists the available documentation indexes.

# getTool

> Look up a registered SwaigFunction by name.

Look up a registered `SwaigFunction` by name.

## **Parameters**

**`name`** `string` — required

The tool name to search for.

---

## **Returns**

`SwaigFunction | undefined` -- The `SwaigFunction` instance, or `undefined` if not
found or not a `SwaigFunction`.

## **Example**

```typescript {14}
import { AgentBase } from '@signalwire/sdk';

const agent = new AgentBase({ name: 'assistant', route: '/assistant' });
agent.defineTool({
  name: 'get_weather',
  description: 'Get the current weather',
  parameters: {
    type: 'object',
    properties: { city: { type: 'string' } },
  },
  handler: async (args) => ({ response: `Weather in ${args.city}: sunny` }),
});

const tool = agent.getTool('get_weather');
if (tool) {
  console.log(tool.description); // "Get the current weather"
}
```

> Look up a registered SwaigFunction by name.