drive_create_file · Google MCP: Risk & Policy

WHAT IT DOES

What drive_create_file does on Google

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

WHY IT NEEDS A POLICY

Why drive_create_file needs a policy

This tool creates new files in Google Drive, which is a reversible write operation. It modifies the user's storage by adding new data but does not delete, execute arbitrary code, or commit financial transactions. Medium severity reflects that widespread file creation could consume storage quotas or clutter the user's Drive, but the action is reversible via deletion.

From the tool's definition Tool name is 'drive_create_file' and description states 'Create a file in Google Drive'. The verb 'create' indicates data creation/modification without deletion.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

drive_create_file Rate-limited

drive_create_file 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_create_file": {
      "limits": [
        {
          "counter": "drive_create_file_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 Google, so you can run agents against it safely.

FAQ

Questions about drive_create_file

What does the drive_create_file tool do? +

Create a file in Google Drive. It is categorised as a Write tool in the Google 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_create_file? +

Register the Google MCP server in PolicyLayer and add a rule for drive_create_file: 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. Nothing to install.

What risk level is drive_create_file? +

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

Can I rate-limit drive_create_file? +

Yes. Add a rate_limit block to the drive_create_file 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_create_file completely? +

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

drive_create_file is provided by the Google MCP server (robcerda/google-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.