AI agents call project_geometry to retrieve information from GIS MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a coordinate reference system transformation on a geometry object. It computes a new representation of the geometry in a different CRS without creating, modifying, or deleting any persistent data. It is purely a geometric computation/read operation.
From the tool's definition 'Project a geometry between CRS' — transforms coordinate reference systems, a read/computation operation with no side effects
Documented attack patterns abuse exactly the kind of access project_geometry gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and GIS MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for project_geometry:
{
"version": "1",
"default": "deny",
"tools": {
"project_geometry": {}
}
} project_geometry is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Project a geometry between CRS. It is categorised as a Read tool in the GIS MCP Server MCP Server, which means it retrieves data without modifying state.
Register the GIS MCP Server MCP server in PolicyLayer and add a rule for project_geometry: 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 GIS MCP Server. Nothing to install.
project_geometry 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 project_geometry 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 project_geometry. 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.
project_geometry is provided by the GIS MCP Server MCP server (mahdin75/gis-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from GIS MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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98 GIS MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.