pptx_add_image · Pptx MCP: Risk & Policy

WHAT IT DOES

What pptx_add_image does on Pptx

AI agents use pptx_add_image 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_image needs a policy

This tool creates or modifies presentation data by adding image objects to slides. It is reversible (images can be removed or replaced), so it falls under Write rather than Destructive.

From the tool's definition Tool description states 'Add an image...to a slide', which is a create/modify operation on presentation content.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

pptx_add_image Rate-limited

pptx_add_image 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_image": {
      "limits": [
        {
          "counter": "pptx_add_image_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_image

What does the pptx_add_image tool do? +

Add an image (PNG, JPG, SVG) to a slide. Position in inches. If only width or height is given, aspect ratio is preserved. If both given, image stretches to fit. 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_image? +

Register the Pptx MCP server in PolicyLayer and add a rule for pptx_add_image: 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_image? +

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

Can I rate-limit pptx_add_image? +

Yes. Add a rate_limit block to the pptx_add_image 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_image completely? +

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

pptx_add_image 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.