---
url: 'https://adk.nht.io/api/@nhtio/adk/guards/functions/isTool.md'
---

# Function: isTool()

```ts
function isTool(value: unknown): value is Tool<SpooledArtifact>;
```

Defined in: [guards.ts:68](https://github.com/NHTIO/ADK/blob/v1.20260605.0/src/guards.ts#L68)

Returns `true` if `value` is a [@nhtio/adk!Tool](../../forge/classes/Tool.md) instance.

## Parameters

| Parameter | Type      |
| --------- | --------- |
| `value`   | `unknown` |

## Returns

`value is Tool<SpooledArtifact>`