pptx_add_chart · Pptx MCP: Risk & Policy

WHAT IT DOES

What pptx_add_chart does on Pptx

AI agents use pptx_add_chart 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_chart needs a policy

The 'add_' prefix and context among sibling tools that create/modify presentation elements (bullets, callouts, images, tables) indicate this tool writes new data to the .pptx file. This is reversible (content can be deleted or modified later), placing it in Write rather than Destructive. It does not execute arbitrary code, delete data, or involve financial operations.

From the tool's definition Tool name 'pptx_add_chart' indicates creation of chart content within PowerPoint presentations. Sibling tools all use 'add_' prefix (pptx_add_image, pptx_add_data_table, etc.), confirming this creates new presentation content.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

pptx_add_chart Rate-limited

pptx_add_chart 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_chart": {
      "limits": [
        {
          "counter": "pptx_add_chart_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_chart

What does the pptx_add_chart tool do? +

pptx_add_chart. 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_chart? +

Register the Pptx MCP server in PolicyLayer and add a rule for pptx_add_chart: 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_chart? +

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

Can I rate-limit pptx_add_chart? +

Yes. Add a rate_limit block to the pptx_add_chart 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_chart completely? +

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

pptx_add_chart 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.