Calculate travel distance and time between multiple origins and destinations
AI agents call distance-matrix to retrieve information from Google Services MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves calculated travel metrics (distance and time) based on provided origins and destinations. It is a read-only operation with no side effects, data modification, code execution, or irreversible actions. The low severity reflects minimal risk if misused by an AI agent—it may consume API quota or return inaccurate routing data, but poses no direct threat to user data, systems, or finances.
From the tool's definition Tool name 'distance-matrix' and description 'Calculate travel distance and time between multiple origins and destinations' indicate a query/retrieval operation that computes routing metrics without modifying data or executing external operations.
Attacks that exploit this kind of access
Calculate travel distance and time between multiple origins and destinations. It is categorised as a Read tool in the Google Services MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Google Services MCP Server MCP server in PolicyLayer and add a rule for 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 Services MCP Server. Nothing to install.
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 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 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.
distance-matrix is provided by the Google Services MCP Server MCP server (ricleedo/google-service-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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