transform_coordinates · QGIS MCP: Risk & Policy

WHAT IT DOES

What transform_coordinates does on QGIS MCP

AI agents invoke transform_coordinates to trigger actions in QGIS MCP. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why transform_coordinates needs a policy

While coordinate transformation itself is mathematically deterministic and does not modify persistent data in QGIS projects, it is fundamentally an operation that executes code/algorithms in response to user input. The tool accepts parameters (coordinates and CRS specifications) and triggers computational execution.

From the tool's definition Tool performs coordinate transformation operations in QGIS, which involves computational execution on geospatial data. The tool 'transform_coordinates' executes a spatial operation that processes input coordinates and produces output based on algorithm logic.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

transform_coordinates Rate-limited

transform_coordinates 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.

View as policy code

policy.json

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

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches QGIS MCP, so you can run agents against it safely.

FAQ

Questions about transform_coordinates

What does the transform_coordinates tool do? +

Transform coordinates between CRS. Accepts a point {x, y},. It is categorised as a Execute tool in the QGIS MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on transform_coordinates? +

Register the QGIS MCP server in PolicyLayer and add a rule for transform_coordinates: 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 QGIS MCP. Nothing to install.

What risk level is transform_coordinates? +

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

Can I rate-limit transform_coordinates? +

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

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

transform_coordinates is provided by the QGIS MCP server (nkarasiak/qgis-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.