update_section_style · Google MCP: Risk & Policy

WHAT IT DOES

What update_section_style does on Google

AI agents use update_section_style 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 update_section_style needs a policy

This tool modifies document structure and formatting in a reversible manner. While it changes document state, style updates can be undone/reverted (unlike destructive deletions). The blast radius is medium because malicious use could corrupt document layout or make content unreadable, but the changes are not permanent and can be corrected. This is clearly a Write operation rather than Execute or Destructive.

From the tool's definition The tool updates section-level style properties in a Google Doc including columns, margins, and headers/footers. The verb 'update' and the description of modifying document formatting properties indicate this is a reversible modification operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_section_style Rate-limited

update_section_style 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_section_style": {
      "limits": [
        {
          "counter": "update_section_style_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, so you can run agents against it safely.

FAQ

Questions about update_section_style

What does the update_section_style tool do? +

Update section-level style in a Google Doc (columns, margins, headers/footers). 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 update_section_style? +

Register the Google MCP server in PolicyLayer and add a rule for update_section_style: 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 update_section_style? +

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

Can I rate-limit update_section_style? +

Yes. Add a rate_limit block to the update_section_style 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_section_style completely? +

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

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