# foundation-domain-distance

`station__foundation__foundation-domain-distance` · external (needs EXECUTION_BACKEND_URL configured) · domain `foundation` · pv-relevance `non-pv`

distance = 1 - (w1 × T1_overlap + w2 × T2_overlap + w3 × T3_overlap)

> **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

- `primitives_a` *array* (required) — Primitives in domain A.
- `primitives_b` *array* (required) — Primitives in domain B.
- `w1` *number* (required)
- `w2` *number* (required)
- `w3` *number* (required)

## Example call

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

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "station__foundation__foundation-domain-distance",
    "arguments": {
      "primitives_a": [],
      "primitives_b": [],
      "w1": 0,
      "w2": 0,
      "w3": 0
    }
  }
}
```

## Related

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