drive_append_text · Google Drive MCP Server MCP

WHAT IT DOES

What drive_append_text does on Google Drive MCP Server

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

WHY IT NEEDS A POLICY

Why drive_append_text needs a policy

This tool modifies data reversibly by appending text to an existing file. It is not destructive (data is not deleted or overwritten irreversibly), not execute (no arbitrary code execution), and not read-only. The severity is medium because appending to files could corrupt data or inject malicious content, but the effect is theoretically reversible through removal or correction of the appended text.

From the tool's definition Tool name 'drive_append_text' and description 'Append plain text to an existing text file in Drive' indicate modification of existing file content through appending operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

drive_append_text Rate-limited

drive_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": {
    "drive_append_text": {
      "limits": [
        {
          "counter": "drive_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 Google Drive MCP Server, so you can run agents against it safely.

FAQ

Questions about drive_append_text

What does the drive_append_text tool do? +

Append plain text to an existing text file in Drive. It is categorised as a Write tool in the Google 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 drive_append_text? +

Register the Google Drive MCP Server MCP server in PolicyLayer and add a rule for drive_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 Google Drive MCP Server. Nothing to install.

What risk level is drive_append_text? +

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

Can I rate-limit drive_append_text? +

Yes. Add a rate_limit block to the drive_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 drive_append_text completely? +

Set action: deny in the PolicyLayer policy for drive_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 drive_append_text? +

drive_append_text is provided by the Google Drive MCP Server MCP server (rishipradeep-think41/google-drive-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.