create_geojson_layer · Leaflet MCP: Risk & Policy

WHAT IT DOES

What create_geojson_layer does on Leaflet

AI agents use create_geojson_layer to create or update resources in Leaflet — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Leaflet environment.

WHY IT NEEDS A POLICY

Why create_geojson_layer needs a policy

The tool generates code (a reversible write operation) to configure map layers and styling rather than executing commands or accessing external systems. While it modifies how data is displayed, the output is code artifact generation with no destructive operations, financial implications, or direct command execution on systems outside the map visualization context.

From the tool's definition Tool name and description indicate it 'generates code' for displaying GeoJSON data on a Leaflet map. The description states 'Generate code for loading and displaying GeoJSON data' with 'custom styling and interactions.' This is code generation that creates or…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_geojson_layer Rate-limited

create_geojson_layer stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_geojson_layer": {
      "limits": [
        {
          "counter": "create_geojson_layer_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about create_geojson_layer

What does the create_geojson_layer tool do? +

Generate code for loading and displaying GeoJSON data on a Leaflet map with custom styling and interactions. It is categorised as a Write tool in the Leaflet MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_geojson_layer? +

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

What risk level is create_geojson_layer? +

create_geojson_layer is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create_geojson_layer? +

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

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

create_geojson_layer is provided by the Leaflet MCP server (philgebauer/leaflet-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.