addComment · Google Docs & Drive MCP Server MCP

WHAT IT DOES

What addComment does on Google Docs & Drive MCP Server

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

WHY IT NEEDS A POLICY

Why addComment needs a policy

This tool creates new comment objects within a document, which is a Write operation. The modification is reversible (comments can be deleted via the sibling deleteComment tool), making it Write rather than Destructive. The severity is low because comment additions have minimal blast radius—they annotate documents without altering core content, executing external code, or causing data loss.

From the tool's definition Tool description states it 'Adds a comment anchored to a specific text range in the document.' The verb 'Adds' indicates creation of new data (a comment). Comments are reversible modifications that do not execute code, delete data, or affect financial systems.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

addComment Rate-limited

addComment 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": {
    "addComment": {
      "limits": [
        {
          "counter": "addcomment_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 Google Docs & Drive MCP Server, so you can run agents against it safely.

FAQ

Questions about addComment

What does the addComment tool do? +

Adds a comment anchored to a specific text range in the document. It is categorised as a Write tool in the Google Docs & Drive MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on addComment? +

Register the Google Docs & Drive MCP Server MCP server in PolicyLayer and add a rule for addComment: 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 Google Docs & Drive MCP Server. Nothing to install.

What risk level is addComment? +

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

Can I rate-limit addComment? +

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

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

addComment is provided by the Google Docs & Drive MCP Server MCP server (oregpt/agenticledger_mcp_docsonly). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.