Validate whether a CRS is appropriate for a specific purpose and location. Detects deprecated CRS usage, area/distance calculation distortion issues, inappropriate zone selection for surveying, and provides improvement suggestions.
AI agents call validate_crs_usage 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 analyzes and reports on coordinate reference system properties without creating, modifying, deleting, or executing any external code or operations. It is purely informational/advisory in nature. The blast radius of misuse is minimal — an AI agent cannot cause harm by calling this tool with incorrect parameters; it would simply return validation results or suggestions. Classification as Read is appropriate.
From the tool's definition The tool 'validate_crs_usage' performs validation and detection of issues (deprecated CRS, distortion, zone problems) and provides 'improvement suggestions'.
Attacks that exploit this kind of access
Validate whether a CRS is appropriate for a specific purpose and location. Detects deprecated CRS usage, area/distance calculation distortion issues, inappropriate zone selection for surveying, and provides improvement suggestions. 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 validate_crs_usage: 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.
validate_crs_usage 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 validate_crs_usage 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 validate_crs_usage. 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.
validate_crs_usage 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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