Recommend the optimal CRS based on purpose and location. Supports web mapping, distance/area calculation, surveying, navigation, data exchange, etc. Full support for Japan Plane Rectangular CS (Zones I-XIX) including multi-zone regions like Hokkaido and Okinawa.
AI agents call recommend_crs to retrieve information from Epsg without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries a knowledge base of CRS data and returns recommendations based on user inputs. It has no side effects, does not execute arbitrary operations, does not modify or delete data, and does not involve financial transactions. It is functionally equivalent to a search or lookup operation, placing it firmly in the Read category with low severity risk.
From the tool's definition The tool 'recommend_crs' retrieves and suggests information about Coordinate Reference Systems based on input parameters (purpose and location).
Attacks that exploit this kind of access
Recommend the optimal CRS based on purpose and location. Supports web mapping, distance/area calculation, surveying, navigation, data exchange, etc. Full support for Japan Plane Rectangular CS (Zones I-XIX) including multi-zone regions like Hokkaido and Okinawa. It is categorised as a Read tool in the Epsg MCP Server, which means it retrieves data without modifying state.
Register the Epsg MCP server in PolicyLayer and add a rule for recommend_crs: 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 Epsg. Nothing to install.
recommend_crs 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 recommend_crs 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 recommend_crs. 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.
recommend_crs is provided by the Epsg MCP server (shuji-bonji/epsg-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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