star_file · Google Docs MCP Server MCP: Risk & Policy

WHAT IT DOES

What star_file does on Google Docs MCP Server

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

WHY IT NEEDS A POLICY

Why star_file needs a policy

Starring a file modifies Drive metadata (the favorite/star status) but does not create, delete, or access file content. This is a reversible write operation with minimal blast radius - the action can be easily undone by unstarring. It does not read sensitive data, execute code, destroy anything, or involve financial transactions. Low severity due to cosmetic nature and full reversibility.

From the tool's definition Tool description states "Star/favorite a file in Google Drive." Starring is a metadata modification operation that marks a file as favorite without altering its content.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

star_file Rate-limited

star_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": {
    "star_file": {
      "limits": [
        {
          "counter": "star_file_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 MCP Server, so you can run agents against it safely.

FAQ

Questions about star_file

What does the star_file tool do? +

Star/favorite a file in Google Drive. It is categorised as a Write tool in the Google Docs 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 star_file? +

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

What risk level is star_file? +

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

Can I rate-limit star_file? +

Yes. Add a rate_limit block to the star_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 star_file completely? +

Set action: deny in the PolicyLayer policy for star_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 star_file? +

star_file is provided by the Google Docs MCP Server MCP server (nickweedon/google-docs-mcp-docker). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.