transform_coords · PostGIS Yukon MCP: Risk & Policy

WHAT IT DOES

What transform_coords does on PostGIS Yukon MCP

AI agents invoke transform_coords to trigger actions in PostGIS Yukon 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_coords needs a policy

transform_coords triggers real processes with real consequences. An agent gone sideways doesn't fire it once — it starts dozens of builds, sends mass notifications, or burns through compute before anyone looks up.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

transform_coords Rate-limited

transform_coords 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_coords": {
      "limits": [
        {
          "counter": "transform_coords_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 PostGIS Yukon MCP, so you can run agents against it safely.

FAQ

Questions about transform_coords

What does the transform_coords tool do? +

转换几何坐标系统. It is categorised as a Execute tool in the PostGIS Yukon 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_coords? +

Register the PostGIS Yukon MCP server in PolicyLayer and add a rule for transform_coords: 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 PostGIS Yukon MCP. Nothing to install.

What risk level is transform_coords? +

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

Can I rate-limit transform_coords? +

Yes. Add a rate_limit block to the transform_coords 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_coords completely? +

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

transform_coords is provided by the PostGIS Yukon MCP server (zmgiser/postgis_yukon_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.