> ## 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.

# PromptArgument

Defined in: [server/prompt.ts:6](https://github.com/PrefectHQ/fastmcp-ts/blob/8976c37f79efa6b87809b884f29a1f235a8c4ad1/src/server/prompt.ts#L6)

## Properties

### complete?

```ts theme={null}
optional complete?: CompleteCallback;
```

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

Autocompletion callback for this argument. When set, a `completion/complete`
request for `{ ref: { type: 'ref/prompt', name }, argument: { name, value } }`
routes here. Not advertised in `prompts/list` — the client discovers it by
calling `completion/complete`.

***

### description?

```ts theme={null}
optional description?: string;
```

Defined in: [server/prompt.ts:8](https://github.com/PrefectHQ/fastmcp-ts/blob/8976c37f79efa6b87809b884f29a1f235a8c4ad1/src/server/prompt.ts#L8)

***

### name

```ts theme={null}
name: string;
```

Defined in: [server/prompt.ts:7](https://github.com/PrefectHQ/fastmcp-ts/blob/8976c37f79efa6b87809b884f29a1f235a8c4ad1/src/server/prompt.ts#L7)

***

### required?

```ts theme={null}
optional required?: boolean;
```

Defined in: [server/prompt.ts:10](https://github.com/PrefectHQ/fastmcp-ts/blob/8976c37f79efa6b87809b884f29a1f235a8c4ad1/src/server/prompt.ts#L10)

When true, the client must supply this argument. Defaults to false.