add_text_item · Keynote MCP Server MCP: Risk & Policy

WHAT IT DOES

What add_text_item does on Keynote MCP Server

AI agents use add_text_item 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 add_text_item needs a policy

This tool creates or modifies presentation content by inserting a text element into a slide. This is a Write operation: the effect is reversible through edits or deletion, not destructive. Severity is medium because misuse by an AI agent could spam slides with unwanted text or clutter a presentation, but the changes can be undone.

From the tool's definition add_text_item 'Adds a new text box to a slide' — creates new content on a presentation slide, which is reversible (text can be edited or deleted).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_text_item Rate-limited

add_text_item 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": {
    "add_text_item": {
      "limits": [
        {
          "counter": "add_text_item_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 add_text_item

What does the add_text_item tool do? +

Adds a new text box to a slide at a specified position and size. 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 add_text_item? +

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

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

Can I rate-limit add_text_item? +

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

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

add_text_item 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.