add_bookmark · QGIS MCP: Risk & Policy

WHAT IT DOES

What add_bookmark does on QGIS MCP

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

WHY IT NEEDS A POLICY

Why add_bookmark needs a policy

This tool creates a new bookmark object within the QGIS project. Bookmarks are metadata that store map extents for quick navigation and are fully reversible (can be deleted). This is a classic Write operation—it modifies project state but does not execute arbitrary code, delete data, or affect financial systems.

From the tool's definition Tool name 'add_bookmark' and description 'Add a spatial bookmark to the project' indicates creation of a navigation bookmark, which is a reversible modification to project metadata.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_bookmark Rate-limited

add_bookmark 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": {
    "add_bookmark": {
      "limits": [
        {
          "counter": "add_bookmark_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 QGIS MCP, so you can run agents against it safely.

FAQ

Questions about add_bookmark

What does the add_bookmark tool do? +

Add a spatial bookmark to the project for quick navigation. It is categorised as a Write tool in the QGIS MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_bookmark? +

Register the QGIS MCP server in PolicyLayer and add a rule for add_bookmark: 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 add_bookmark? +

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

Can I rate-limit add_bookmark? +

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

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

add_bookmark 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.