# viz-interaction-map

`station__observatory__viz-interaction-map` · external (needs EXECUTION_BACKEND_URL configured) · domain `observatory` · pv-relevance `non-pv`

interaction details.

> **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

- `cation_pi_distance` *number* — Maximum cation–ring distance for cation-pi (default 6.0 Å).
- `halogen_bond_distance` *number* — Maximum halogen–acceptor distance (default 3.5 Å).
- `hbond_angle_min` *number* — Minimum D-H···A angle for H-bonds in degrees (default 120°).
- `hbond_distance` *number* — Maximum donor–acceptor distance for H-bonds (default 3.5 Å).
- `hydrophobic_distance` *number* — Maximum distance for hydrophobic contacts (default 4.5 Å).
- `metal_coord_distance` *number* — Maximum metal–ligand distance (default 2.8 Å).
- `molecule_json` *string* (required) — JSON-serialized `nexcore_viz::molecular::Molecule`.
- `pi_stack_angle_max` *number* — Maximum inter-plane angle for pi-stacking in degrees (default 30°).
- `pi_stack_distance` *number* — Maximum ring-centre distance for pi-stacking (default 5.5 Å).
- `salt_bridge_distance` *number* — Maximum distance for salt bridges (default 4.0 Å).

## Example call

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

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "station__observatory__viz-interaction-map",
    "arguments": {
      "molecule_json": ""
    }
  }
}
```

## Related

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