# parallel

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

Parallel signal detection across two independent detectors. Mode 'both' (AND) requires both to fire. Mode 'either' (OR) requires at least one.

> **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

- `value` *number* (required)
- `threshold_1` *number* (required)
- `threshold_2` *number* (required)
- `label_1` *string*
- `label_2` *string*
- `mode` *string* — 'both' (AND) or 'either' (OR). Default: both

## Example call

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

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "station__signal-theory__parallel",
    "arguments": {
      "value": 0,
      "threshold_1": 0,
      "threshold_2": 0
    }
  }
}
```

## Related

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