plane-page-append-content · Plane MCP: Risk & Policy

WHAT IT DOES

What plane-page-append-content does on Plane

AI agents use plane-page-append-content to create or update resources in Plane — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Plane environment.

WHY IT NEEDS A POLICY

Why plane-page-append-content needs a policy

This tool modifies existing page content by appending new material. It is a Write operation because: (1) it creates or modifies data (appends content), (2) the modification is reversible (appended content can be subsequently edited or deleted), and (3) it does not delete or irreversibly destroy data.

From the tool's definition Tool description: 'Append content to the end of an existing page without replacing existing content.' The use of 'append' and 'without replacing' indicates modification of existing data that is reversible (content can be edited or removed later).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

plane-page-append-content Rate-limited

plane-page-append-content 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": {
    "plane-page-append-content": {
      "limits": [
        {
          "counter": "plane-page-append-content_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 Plane, so you can run agents against it safely.

FAQ

Questions about plane-page-append-content

What does the plane-page-append-content tool do? +

Append content to the end of an existing page without replacing existing content. Accepts markdown (default) or HTML. It is categorised as a Write tool in the Plane MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on plane-page-append-content? +

Register the Plane MCP server in PolicyLayer and add a rule for plane-page-append-content: 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 Plane. Nothing to install.

What risk level is plane-page-append-content? +

plane-page-append-content is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit plane-page-append-content? +

Yes. Add a rate_limit block to the plane-page-append-content 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 plane-page-append-content completely? +

Set action: deny in the PolicyLayer policy for plane-page-append-content. 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 plane-page-append-content? +

plane-page-append-content is provided by the Plane MCP server (philipvanlewis/plane-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.