Compute shortest oceangoing route with distance and waypoints between two coordinates.
AI agents call compute_route to retrieve information from Searoute without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries maritime routing algorithms to return read-only results (route geometry, distance, waypoints). It neither modifies data, executes arbitrary code, triggers financial transactions, nor destroys data. The blast radius of misuse is minimal—an agent could request many routes and consume computational resources, but cannot cause persistent harm.
From the tool's definition Tool computes and retrieves oceangoing route data, distance, and waypoints between coordinates in GeoJSON format. No modification, deletion, or execution of external commands occurs.
Documented attack patterns abuse exactly the kind of access compute_route gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Searoute, and nothing reaches the server without passing your rules. This is the rule we recommend for compute_route:
{
"version": "1",
"default": "deny",
"tools": {
"compute_route": {}
}
}compute_route is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Compute shortest oceangoing route with distance and waypoints between two coordinates. It is categorised as a Read tool in the Searoute MCP Server, which means it retrieves data without modifying state.
Register the Searoute MCP server in PolicyLayer and add a rule for compute_route: 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 Searoute. Nothing to install.
compute_route 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 compute_route 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 compute_route. 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.
compute_route is provided by the Searoute MCP server (project-harrison/searoute-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Searoute, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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3 Searoute tools catalogued and risk-classified — across an index of 43,000+ MCP servers.