gearys_c

THE RISK

Low Risk

Why gearys_c needs a policy

Geary's C is a standard spatial autocorrelation metric used in GIS analysis. Computing it requires reading geospatial datasets and performing mathematical calculations to produce a statistical output. This is a pure analytical read operation with no side effects on the data or external systems.

From the tool's definition Tool computes a statistical measure (Global Geary's C Autocorrelation Statistic) on existing geospatial data. The verb 'Compute' combined with 'Statistic' indicates calculation of a metric without modifying underlying data.

Documented attack patterns abuse exactly the kind of access gearys_c gives an agent:

POLICY

How to control gearys_c

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 gearys_c:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "gearys_c": {}
  }
}

gearys_c is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register GIS MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More GIS MCP Server tools

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All 98 GIS MCP Server tools →

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about gearys_c

What does the gearys_c tool do? +

Compute Global Geary's C Autocorrelation Statistic. It is categorised as a Read tool in the GIS MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on gearys_c? +

Register the GIS MCP Server MCP server in PolicyLayer and add a rule for gearys_c: 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.

What risk level is gearys_c? +

gearys_c is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit gearys_c? +

Yes. Add a rate_limit block to the gearys_c 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.

How do I block gearys_c completely? +

Set action: deny in the PolicyLayer policy for gearys_c. 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.

What MCP server provides gearys_c? +

gearys_c 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.

Enforce policy on every GIS MCP Server tool call.

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.

CHECK YOUR STACK →