> ## Documentation Index
> Fetch the complete documentation index at: https://openrouter.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# CascadeMode

How a universal `tool_search` query reaches the client's own tool search. Absent or `keywords`: a `select:` query becomes the words of the selected names and the limit is always filled. `native`: a `select:` query passes through verbatim when the client search documents `select:`, and the limit field is sent only when the model gave one, unless the client search requires it, in which case its documented default is sent. Experimental.

## Example Usage

```typescript theme={null}
import { CascadeMode } from "@openrouter/sdk/models";

let value: CascadeMode = "keywords";

// Open enum: unrecognized values are captured as Unrecognized<string>
```

## Values

```typescript theme={null}
"keywords" | "native" | Unrecognized<string>
```