# distance

number

Agent View of the PolicyLayer registry record for `distance`. HTML page: https://policylayer.com/tools/baidu-map/distance

## Facts

- Tool: `distance`
- Server: Baidu Map (`@baidumap/mcp-server-baidu-map`) — https://policylayer.com/tools/baidu-map.md
- Install: `npx -y @baidumap/mcp-server-baidu-map`
- Homepage: https://www.npmjs.com/package/@baidumap/mcp-server-baidu-map
- Risk category: Read (Low risk)
- Registry record: grade C, 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": "distance",
    "arguments": {}
  }
}
```

## Why distance is rated Low

On a Baidu Map MCP server, a tool named 'distance' almost certainly retrieves a calculated distance value between geographic coordinates. This is a read operation with no side effects. The description 'number' is uninformative and lowers confidence, but the context of sibling tools (adcode, address, city, area, etc.) supports this interpretation. Severity is low as misuse would only expose geographic distance data.

From the tool's own definition: "Tool name is 'distance' and description is merely 'number' — uninformative description, but 'distance' on a mapping API strongly implies calculating distance between points (a read/query operation)."

## Use case

AI agents call distance to retrieve information from Baidu Map 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 Baidu Map:

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

## Other tools on Baidu Map (43)

- `business` — Other — https://policylayer.com/tools/baidu-map/business.md
- `cityCode` — Other — https://policylayer.com/tools/baidu-map/citycode.md
- `comprehension` — Other — https://policylayer.com/tools/baidu-map/comprehension.md
- `confidence` — Other — https://policylayer.com/tools/baidu-map/confidence.md
- `detail` — Other — https://policylayer.com/tools/baidu-map/detail.md
- `level` — Other — https://policylayer.com/tools/baidu-map/level.md
- `new_catalog` — Other — https://policylayer.com/tools/baidu-map/new-catalog.md
- `precise` — Other — https://policylayer.com/tools/baidu-map/precise.md
- `result_type` — Other — https://policylayer.com/tools/baidu-map/result-type.md
- `tag` — Other — https://policylayer.com/tools/baidu-map/tag.md
- `uid` — Other — https://policylayer.com/tools/baidu-map/uid.md
- `adcode` — Read — https://policylayer.com/tools/baidu-map/adcode.md
- `address` — Read — https://policylayer.com/tools/baidu-map/address.md
- `addressComponent` — Read — https://policylayer.com/tools/baidu-map/addresscomponent.md
- `area` — Read — https://policylayer.com/tools/baidu-map/area.md
- `business_info` — Read — https://policylayer.com/tools/baidu-map/business-info.md
- `city` — Read — https://policylayer.com/tools/baidu-map/city.md
- `comment_num` — Read — https://policylayer.com/tools/baidu-map/comment-num.md
- `content_tag` — Read — https://policylayer.com/tools/baidu-map/content-tag.md
- `country` — Read — https://policylayer.com/tools/baidu-map/country.md
- `detail_info` — Read — https://policylayer.com/tools/baidu-map/detail-info.md
- `detail_url` — Read — https://policylayer.com/tools/baidu-map/detail-url.md
- `direction` — Read — https://policylayer.com/tools/baidu-map/direction.md
- `district` — Read — https://policylayer.com/tools/baidu-map/district.md
- `formatted_address` — Read — https://policylayer.com/tools/baidu-map/formatted-address.md
- `formatted_address_poi` — Read — https://policylayer.com/tools/baidu-map/formatted-address-poi.md
- `image_num` — Read — https://policylayer.com/tools/baidu-map/image-num.md
- `location` — Read — https://policylayer.com/tools/baidu-map/location.md
- `navi_location` — Read — https://policylayer.com/tools/baidu-map/navi-location.md
- `overall_rating` — Read — https://policylayer.com/tools/baidu-map/overall-rating.md
- …and 13 more: https://policylayer.com/tools/baidu-map.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=baidu-map · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/baidu-map