keynote_set_font · Keynote MCP: Risk & Policy

WHAT IT DOES

What keynote_set_font does on Keynote

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

WHY IT NEEDS A POLICY

Why keynote_set_font needs a policy

keynote_set_font modifies the formatting properties of text elements within a presentation. This is a write operation because it changes data (font attributes) reversibly—users can undo or reapply different formatting. It does not delete content (Destructive), execute arbitrary code (Execute), or move money (Financial).

From the tool's definition Tool description states it 'Set font family, size, and/or color on a text element,' which modifies presentation content. The server description confirms it 'edits...Apple Keynote presentations.' This is a reversible modification operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

keynote_set_font Rate-limited

keynote_set_font 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": {
    "keynote_set_font": {
      "limits": [
        {
          "counter": "keynote_set_font_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, so you can run agents against it safely.

FAQ

Questions about keynote_set_font

What does the keynote_set_font tool do? +

Set font family, size, and/or color on a text element. Any omitted fields are left unchanged. Use this to enforce typographic consistency across slides. It is categorised as a Write tool in the Keynote MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on keynote_set_font? +

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

What risk level is keynote_set_font? +

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

Can I rate-limit keynote_set_font? +

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

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

keynote_set_font is provided by the Keynote MCP server (tszaks/keynote-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.