update_gas_file · Google Apps Script MCP Server MCP

WHAT IT DOES

What update_gas_file does on Google Apps Script MCP Server

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

WHY IT NEEDS A POLICY

Why update_gas_file needs a policy

The tool updates GAS files, which is a Write operation (modifies code/content). Severity is high because: (1) Google Apps Script files often contain sensitive business logic and can access Google Workspace data, Gmail, Drive, etc.; (2) malicious modifications to deployed scripts could compromise organizational security; (3) the server is described as managing 'web app deployments,' meaning updates could affect…

From the tool's definition Tool name 'update_gas_file' and description stating 'Google Apps Scriptファイルを更新します' (Updates a Google Apps Script file) indicate modification of script code/content. This is a write operation that creates or modifies data reversibly.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_gas_file Rate-limited

update_gas_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": {
    "update_gas_file": {
      "limits": [
        {
          "counter": "update_gas_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 Apps Script MCP Server, so you can run agents against it safely.

FAQ

Questions about update_gas_file

What does the update_gas_file tool do? +

Google Apps Scriptファイルを更新します. It is categorised as a Write tool in the Google Apps Script 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 update_gas_file? +

Register the Google Apps Script MCP Server MCP server in PolicyLayer and add a rule for update_gas_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 Apps Script MCP Server. Nothing to install.

What risk level is update_gas_file? +

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

Can I rate-limit update_gas_file? +

Yes. Add a rate_limit block to the update_gas_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 update_gas_file completely? +

Set action: deny in the PolicyLayer policy for update_gas_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 update_gas_file? +

update_gas_file is provided by the Google Apps Script MCP Server MCP server (utakata/google-apps-script-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.