> ## 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.

# ToolCallError

Defined in: [client/client.ts:42](https://github.com/PrefectHQ/fastmcp-ts/blob/8976c37f79efa6b87809b884f29a1f235a8c4ad1/src/client/client.ts#L42)

## Extends

* `Error`

## Constructors

### Constructor

```ts theme={null}
new ToolCallError(message, content): ToolCallError;
```

Defined in: [client/client.ts:45](https://github.com/PrefectHQ/fastmcp-ts/blob/8976c37f79efa6b87809b884f29a1f235a8c4ad1/src/client/client.ts#L45)

#### Parameters

##### message

`string`

##### content

`ContentBlock`\[]

#### Returns

`ToolCallError`

#### Overrides

```ts theme={null}
Error.constructor
```

## Properties

### content

```ts theme={null}
readonly content: ContentBlock[];
```

Defined in: [client/client.ts:43](https://github.com/PrefectHQ/fastmcp-ts/blob/8976c37f79efa6b87809b884f29a1f235a8c4ad1/src/client/client.ts#L43)