append_text · LLM2Docs (Unofficial) MCP: Risk & Policy

WHAT IT DOES

What append_text does on LLM2Docs (Unofficial)

AI agents use append_text to create or update resources in LLM2Docs (Unofficial) — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your LLM2Docs (Unofficial) environment.

WHY IT NEEDS A POLICY

Why append_text needs a policy

This tool creates or modifies data in a reversible manner (text can be edited or deleted afterward). It is not destructive since appended text can be undone. It does not execute arbitrary code, delete data irreversibly, or involve financial operations.

From the tool's definition Tool name 'append_text' and description 'Add text to the end of a Google Document' clearly indicate modification of document content.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

append_text Rate-limited

append_text 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": {
    "append_text": {
      "limits": [
        {
          "counter": "append_text_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 LLM2Docs (Unofficial), so you can run agents against it safely.

FAQ

Questions about append_text

What does the append_text tool do? +

Add text to the end of a Google Document. It is categorised as a Write tool in the LLM2Docs (Unofficial) MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on append_text? +

Register the LLM2Docs (Unofficial) MCP server in PolicyLayer and add a rule for append_text: 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 LLM2Docs (Unofficial). Nothing to install.

What risk level is append_text? +

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

Can I rate-limit append_text? +

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

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

append_text is provided by the LLM2Docs (Unofficial) MCP server (nomannayeem/google-docs-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.