使用 Routes API 计算多个起点和终点之间的旅行距离和时间
AI agents call maps_distance_matrix to retrieve information from Google Maps MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
maps_distance_matrix retrieves distance and duration metrics from Google Maps API based on provided coordinates. It does not create, modify, delete, or execute arbitrary operations. The blast radius of misuse is minimal—an agent could request excessive API calls (DoS risk) but cannot corrupt data, execute code, or trigger financial transactions. This is purely informational retrieval.
From the tool's definition Tool description indicates it 'calculates travel distance and time' between multiple origins and destinations using the Routes API. This is a data retrieval operation with no modification, creation, or deletion of data.
Attacks that exploit this kind of access
使用 Routes API 计算多个起点和终点之间的旅行距离和时间. It is categorised as a Read tool in the Google Maps MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Google Maps MCP Server MCP server in PolicyLayer and add a rule for maps_distance_matrix: 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 Google Maps MCP Server. Nothing to install.
maps_distance_matrix 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_matrix 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_matrix. 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_matrix is provided by the Google Maps MCP Server MCP server (lesonky/google-maps-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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