# signal-theory-detect

`station__signal-detection__signal-theory-detect` · external (needs EXECUTION_BACKEND_URL configured) · domain `signal-detection` · pv-relevance `pv-core`

Compute single-sensor detection probability.

> **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

- `expected` *number* (required) — Expected count or rate (under null hypothesis)
- `observed` *number* (required) — Observed count or rate
- `threshold` *number* — Detection threshold (default: 2.0)

## Example call

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

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "station__signal-detection__signal-theory-detect",
    "arguments": {
      "expected": 0,
      "observed": 0
    }
  }
}
```

## Related

- [/tools](/tools) — all 3062 tools
- [/tools/signal-detection__signal-theory-detect](/tools/signal-detection__signal-theory-detect) — HTML page
- [/tools/signal-detection__signal-theory-detect/json](/tools/signal-detection__signal-theory-detect/json) — JSON form (agent-friendly)
- [/api/mcp](/api/mcp) — endpoint
- [/AGENTS.md](/AGENTS.md) — agent guide