raster_algebra

THE RISK

High Risk

Why raster_algebra needs a policy

Raster algebra typically refers to performing mathematical or logical operations on raster datasets (e.g., map algebra, band math), which constitutes executing computational operations that can transform or overwrite geospatial data. Without a description, the exact behavior is uncertain, but raster algebra tools commonly modify or produce derived datasets.

From the tool's definition Tool name 'raster_algebra' on a GIS server; description is empty and uninformative.

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

POLICY

How to control raster_algebra

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 raster_algebra:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "raster_algebra": {
      "limits": [
        {
          "counter": "raster_algebra_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

raster_algebra stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. 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.

RATE-LIMIT 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 →

Execute tools on other servers

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Go deeper

High-risk tools in GIS MCP Server → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about raster_algebra

What does the raster_algebra tool do? +

raster_algebra. It is categorised as a Execute tool in the GIS MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on raster_algebra? +

Register the GIS MCP Server MCP server in PolicyLayer and add a rule for raster_algebra: 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 raster_algebra? +

raster_algebra is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit raster_algebra? +

Yes. Add a rate_limit block to the raster_algebra 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 raster_algebra completely? +

Set action: deny in the PolicyLayer policy for raster_algebra. 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 raster_algebra? +

raster_algebra 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 →