update_shape · Keynote MCP Server MCP: Risk & Policy

WHAT IT DOES

What update_shape does on Keynote MCP Server

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

WHY IT NEEDS A POLICY

Why update_shape needs a policy

This tool modifies existing shape objects within a Keynote presentation. Modification is reversible—the user can undo, delete, or re-edit the shape. It does not execute arbitrary code, delete data irreversibly, or move money. The impact is confined to a single presentation document's visual elements, so severity is medium rather than high.

From the tool's definition Tool name 'update_shape' and description 'Modifies a shape' indicate reversible modification of presentation content. The sibling tools (add_slide, add_text_item, add_chart, etc.) are all Write-category operations that create or modify presentation elements.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_shape Rate-limited

update_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": {
    "update_shape": {
      "limits": [
        {
          "counter": "update_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 Keynote MCP Server, so you can run agents against it safely.

FAQ

Questions about update_shape

What does the update_shape tool do? +

Modifies a shape. It is categorised as a Write tool in the Keynote 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 update_shape? +

Register the Keynote MCP Server MCP server in PolicyLayer and add a rule for update_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 Keynote MCP Server. Nothing to install.

What risk level is update_shape? +

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

Can I rate-limit update_shape? +

Yes. Add a rate_limit block to the update_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 update_shape completely? +

Set action: deny in the PolicyLayer policy for update_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 update_shape? +

update_shape is provided by the Keynote MCP Server MCP server (superdwayne/keynotemp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.