pptx_format_shape · Pptx MCP: Risk & Policy

WHAT IT DOES

What pptx_format_shape does on Pptx

AI agents use pptx_format_shape 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_format_shape needs a policy

This tool modifies existing shapes in a PowerPoint presentation (reposition, resize, restyle) but does not delete data or execute arbitrary code. The changes are reversible through undo or manual correction. While it alters presentation state, the impact is limited to shape formatting properties without side effects on external systems or destructive data loss.

From the tool's definition Tool description states it can 'Reposition, resize, or restyle an existing shape' - these are reversible modifications to presentation content.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

pptx_format_shape Rate-limited

pptx_format_shape 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_format_shape": {
      "limits": [
        {
          "counter": "pptx_format_shape_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_format_shape

What does the pptx_format_shape tool do? +

Reposition, resize, or restyle an existing shape. Dimensions in inches. 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_format_shape? +

Register the Pptx MCP server in PolicyLayer and add a rule for pptx_format_shape: 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_format_shape? +

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

Can I rate-limit pptx_format_shape? +

Yes. Add a rate_limit block to the pptx_format_shape 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_format_shape completely? +

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

pptx_format_shape 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.