# viz-node-confidence

`station__observatory__viz-node-confidence` · external (needs EXECUTION_BACKEND_URL configured) · domain `observatory` · pv-relevance `non-pv`

Viz Node Confidence

> **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

- `api_derived` *boolean*
- `chi_squared` *number*
- `fdr_rejected` *boolean*
- `prr` *number*
- `score` *number*
- `severity` *number*
- `signal_detected` *boolean*
- `source` *string* (required) — Confidence source type: "chi_squared", "signal_strength", "severity", "relevance_score", or "structural_certainty"

## Example call

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

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "station__observatory__viz-node-confidence",
    "arguments": {
      "source": ""
    }
  }
}
```

## Related

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