> ## Documentation Index
> Fetch the complete documentation index at: https://colin-feat-client-cache-mode.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# CallToolOptions

Defined in: [client/interfaces.ts:22](https://github.com/PrefectHQ/fastmcp-ts/blob/8976c37f79efa6b87809b884f29a1f235a8c4ad1/src/client/interfaces.ts#L22)

## Extends

* [`RequestOptions`](/api/client/interfaces/RequestOptions)

## Properties

### onProgress?

```ts theme={null}
optional onProgress?: ProgressHandler;
```

Defined in: [client/interfaces.ts:24](https://github.com/PrefectHQ/fastmcp-ts/blob/8976c37f79efa6b87809b884f29a1f235a8c4ad1/src/client/interfaces.ts#L24)

Per-call progress handler, overrides the client-level handler for this call.

***

### signal?

```ts theme={null}
optional signal?: AbortSignal;
```

Defined in: [client/interfaces.ts:19](https://github.com/PrefectHQ/fastmcp-ts/blob/8976c37f79efa6b87809b884f29a1f235a8c4ad1/src/client/interfaces.ts#L19)

AbortSignal for caller-controlled cancellation.

#### Inherited from

[`RequestOptions`](/api/client/interfaces/RequestOptions).[`signal`](/api/client/interfaces/RequestOptions#signal)

***

### timeout?

```ts theme={null}
optional timeout?: number;
```

Defined in: [client/interfaces.ts:17](https://github.com/PrefectHQ/fastmcp-ts/blob/8976c37f79efa6b87809b884f29a1f235a8c4ad1/src/client/interfaces.ts#L17)

Per-request timeout in seconds. Overrides client-level defaultOptions.

#### Inherited from

[`RequestOptions`](/api/client/interfaces/RequestOptions).[`timeout`](/api/client/interfaces/RequestOptions#timeout)