# audio-device-capabilities

`station__audio__audio-device-capabilities` · external (needs EXECUTION_BACKEND_URL configured) · domain `audio` · pv-relevance `non-pv`

Check device capabilities — preferred spec and format support.

> **Note:** This tool routes through an external execution backend. If `EXECUTION_BACKEND_URL` is unset on the server, calls return JSON-RPC error `-32603 "Tool execution backend not configured"`. Tools with `backend: native` execute in-process and are always callable.

## Agent metadata

- `idempotent`: unknown
- `read_only`: unknown
- `expected_latency_ms`: unknown (not yet contract-tested)
- `cost_tokens_estimate`: unknown

## Input schema

- `formats` *array* (required) — Supported sample formats: ["s16", "f32", ...].
- `layouts` *array* (required) — Supported channel layouts: ["mono", "stereo", ...].
- `max_buffer_frames` *integer* — Maximum buffer frames.
- `min_buffer_frames` *integer* — Minimum buffer frames.
- `rates` *array* (required) — Supported sample rates in Hz.

## Example call

```json
POST /api/mcp
Content-Type: application/json

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "station__audio__audio-device-capabilities",
    "arguments": {
      "formats": [],
      "layouts": [],
      "rates": []
    }
  }
}
```

## Related

- [/tools](/tools) — all 3062 tools
- [/tools/audio__audio-device-capabilities](/tools/audio__audio-device-capabilities) — HTML page
- [/tools/audio__audio-device-capabilities/json](/tools/audio__audio-device-capabilities/json) — JSON form (agent-friendly)
- [/api/mcp](/api/mcp) — endpoint
- [/AGENTS.md](/AGENTS.md) — agent guide