pptx_add_textbox · Pptx MCP: Risk & Policy

WHAT IT DOES

What pptx_add_textbox does on Pptx

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

WHY IT NEEDS A POLICY

Why pptx_add_textbox needs a policy

This tool creates and inserts a new text box element into a PowerPoint slide, which is a reversible modification of data. It does not execute arbitrary code, delete content, or move money. The blast radius is minimal—a misused instance adds unwanted text boxes to a presentation, which can be easily undone or edited. Therefore, this is categorized as Write with low severity.

From the tool's definition Tool name 'pptx_add_textbox' and description 'Add a text box to a slide' clearly indicate a creation operation that modifies presentation content by inserting a new element.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

pptx_add_textbox Rate-limited

pptx_add_textbox 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": {
    "pptx_add_textbox": {
      "limits": [
        {
          "counter": "pptx_add_textbox_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 Pptx, so you can run agents against it safely.

FAQ

Questions about pptx_add_textbox

What does the pptx_add_textbox tool do? +

Add a text box to a slide. Position and size in inches. Alignment: left/center/right. Vertical anchor: top/middle/bottom. It is categorised as a Write tool in the Pptx MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on pptx_add_textbox? +

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

What risk level is pptx_add_textbox? +

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

Can I rate-limit pptx_add_textbox? +

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

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

pptx_add_textbox is provided by the Pptx MCP server (knorq-ai/pptx-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.