# sok_grunnkrets

Slå opp statistisk grunnkrets (SSB/Kartverket-inndeling) for et geografisk punkt (WGS84). Returnerer grunnkretsnummer (8 sifre), grunnkretsnavn og kommunenummer. Grunnkretsnummeret kan brukes direkte som Region-filter i SSB-tabeller på grunnkretsnivå (f.eks. 04362 alders-/kjønnsfordeling, 04317 befolkning) for ekte nabolagsdemografi. Kilde: Kartverket WFS (åpen, avtale-fri).

Agent View of the PolicyLayer registry record for `sok_grunnkrets`. HTML page: https://policylayer.com/tools/3121n-nor-data-kartverket-mcp/sok-grunnkrets

## Facts

- Tool: `sok_grunnkrets`
- Server: Kartverket (`@nor-data/kartverket-mcp`) — https://policylayer.com/tools/3121n-nor-data-kartverket-mcp.md
- Install: `npx -y @nor-data/kartverket-mcp`
- Homepage: https://github.com/3121n/nor-data-kartverket-mcp
- Risk category: Read (Low risk)
- Registry record: grade A, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "sok_grunnkrets",
    "arguments": {}
  }
}
```

## Why sok_grunnkrets is rated Low

This tool performs a geographic lookup query that retrieves read-only reference data (Norwegian statistical districts/neighborhoods) based on coordinates. It has no capability to modify, delete, execute code, or affect external systems. The data returned is public geographic/demographic metadata from open government sources. No authentication required and no destructive or financial operations are possible.

From the tool's own definition: "Tool name 'sok_grunnkrets' (search/lookup) and description states it 'Slå opp' (look up) and 'Returnerer' (returns) statistical district data for a geographic point."

## Use case

AI agents call sok_grunnkrets to retrieve information from Kartverket without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Kartverket:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "sok_grunnkrets": {}
  }
}
```

## Other tools on Kartverket (6)

- `hent_hoyde` — Read — https://policylayer.com/tools/3121n-nor-data-kartverket-mcp/hent-hoyde.md
- `sok_adresse` — Read — https://policylayer.com/tools/3121n-nor-data-kartverket-mcp/sok-adresse.md
- `sok_bygning` — Read — https://policylayer.com/tools/3121n-nor-data-kartverket-mcp/sok-bygning.md
- `sok_eiendom` — Read — https://policylayer.com/tools/3121n-nor-data-kartverket-mcp/sok-eiendom.md
- `sok_kommune` — Read — https://policylayer.com/tools/3121n-nor-data-kartverket-mcp/sok-kommune.md
- `sok_stedsnavn` — Read — https://policylayer.com/tools/3121n-nor-data-kartverket-mcp/sok-stedsnavn.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=3121n-nor-data-kartverket-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/3121n-nor-data-kartverket-mcp