add_rectangle · Google Slides MCP Server MCP: Risk & Policy

WHAT IT DOES

What add_rectangle does on Google Slides MCP Server

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

WHY IT NEEDS A POLICY

Why add_rectangle needs a policy

This tool modifies a Google Slides presentation by inserting a new graphical element (rectangle) to a slide. This is a reversible, non-destructive write operation. The blast radius is medium because an AI agent could spam shapes across presentations, but the changes can be easily undone by users.

From the tool's definition add_rectangle creates or modifies presentation content by adding a shape to a slide. The description explicitly states it adds a rectangle, which is a content creation action. No mention of deletion or data destruction.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_rectangle Rate-limited

add_rectangle 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": {
    "add_rectangle": {
      "limits": [
        {
          "counter": "add_rectangle_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 Slides MCP Server, so you can run agents against it safely.

FAQ

Questions about add_rectangle

What does the add_rectangle tool do? +

Add a rectangle to a slide with 20% of slide dimensions. It is categorised as a Write tool in the Google Slides 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 add_rectangle? +

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

What risk level is add_rectangle? +

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

Can I rate-limit add_rectangle? +

Yes. Add a rate_limit block to the add_rectangle 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 add_rectangle completely? +

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

add_rectangle is provided by the Google Slides MCP Server MCP server (vamsikiran353-gif/google-slides-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.