# drift-ks-test

`station__ops-monitoring__drift-ks-test` · external (needs EXECUTION_BACKEND_URL configured) · domain `ops-monitoring` · pv-relevance `non-pv`

(max CDF difference) and approximate p-value. Drift detected if p < alpha.

> **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

- `alpha` *number*
- `current` *array* (required) — Current (test) distribution values
- `reference` *array* (required) — Reference (baseline) distribution values

## Example call

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

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "station__ops-monitoring__drift-ks-test",
    "arguments": {
      "current": [],
      "reference": []
    }
  }
}
```

## Related

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