AI agents call maps_distance to retrieve information from 高德地图 without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a pure query/calculation tool that retrieves distance information between two geographic coordinates. It has no side effects, creates no resources, modifies no data, and executes no external operations. The blast radius of misuse is minimal—an AI agent could only retrieve distance calculations, which poses negligible security risk.
From the tool's definition Tool name 'maps_distance' and description '测量两个经纬度坐标之间的距离,支持驾车、步行以及球面距离测量' (measure distance between two latitude/longitude coordinates, supports driving, walking, and spherical distance measurement).
Documented attack patterns abuse exactly the kind of access maps_distance gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and 高德地图, and nothing reaches the server without passing your rules. This is the rule we recommend for maps_distance:
{
"version": "1",
"default": "deny",
"tools": {
"maps_distance": {}
}
}maps_distance is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
测量两个经纬度坐标之间的距离,支持驾车、步行以及球面距离测量. It is categorised as a Read tool in the 高德地图 MCP Server, which means it retrieves data without modifying state.
Register the 高德地图 MCP server in PolicyLayer and add a rule for maps_distance: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches 高德地图. Nothing to install.
maps_distance is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the maps_distance rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for maps_distance. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
maps_distance is provided by the 高德地图 MCP server (sugarforever/amap-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 16 高德地图 tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
16 高德地图 tools catalogued and risk-classified — across an index of 42,500+ MCP servers.