add_layout_label · QGIS MCP: Risk & Policy

WHAT IT DOES

What add_layout_label does on QGIS MCP

AI agents use add_layout_label 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_layout_label needs a policy

Adding a layout label creates new content in a QGIS print layout, making it a Write operation (reversible modification). The severity is medium because: (1) the blast radius is limited to the print layout itself, not underlying geospatial data; (2) the action is easily reversible by deleting the label; (3) there is no direct financial impact or data destruction.

From the tool's definition The tool 'add_layout_label' creates new text elements in a print layout by adding a label with specified text content. This is a creation operation that modifies the print layout document reversibly.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_layout_label Rate-limited

add_layout_label 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_layout_label": {
      "limits": [
        {
          "counter": "add_layout_label_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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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_layout_label

What does the add_layout_label tool do? +

Add a text label to a print layout (mm). text may contain [% expression %]. 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_layout_label? +

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

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

Can I rate-limit add_layout_label? +

Yes. Add a rate_limit block to the add_layout_label 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_layout_label completely? +

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

add_layout_label 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.