apply_theme · Keynote MCP Server MCP: Risk & Policy

WHAT IT DOES

What apply_theme does on Keynote MCP Server

AI agents use apply_theme 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 apply_theme needs a policy

The tool modifies presentation metadata and styling (theme, master slides, default formatting) through a Write operation. While this changes the document state, it is fully reversible—another theme can be applied to restore prior appearance. This is not Destructive (data is not deleted), not Execute (no code execution or external operations triggered), and not Financial.

From the tool's definition Applies a theme to the current Keynote presentation, changing the document theme and updating master slides and default styling. This modifies presentation properties and styling but is reversible.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

apply_theme Rate-limited

apply_theme 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": {
    "apply_theme": {
      "limits": [
        {
          "counter": "apply_theme_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 apply_theme

What does the apply_theme tool do? +

Applies a theme to the current Keynote presentation. This changes the document theme, updating master slides and default styling. 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 apply_theme? +

Register the Keynote MCP Server MCP server in PolicyLayer and add a rule for apply_theme: 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 apply_theme? +

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

Can I rate-limit apply_theme? +

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

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

apply_theme 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.