export_slide

THE RISK

Medium Risk

Why export_slide needs a policy

The tool generates and writes presentation output files in multiple formats. While export itself doesn't delete data, it creates new artifacts and may overwrite existing files, making it a Write operation.

From the tool's definition Tool exports Marp presentations to file formats (HTML, PDF, PPTX) using marp-cli. Export operations create new files or overwrite existing ones, constituting data creation and modification.

Documented attack patterns abuse exactly the kind of access export_slide gives an agent:

POLICY

How to control export_slide

PolicyLayer is an MCP gateway — it sits between your AI agents and Marp MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for export_slide:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "export_slide": {
      "limits": [
        {
          "counter": "export_slide_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

export_slide 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.

Create a free account and register Marp MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Marp MCP Server tools

Write add_image_transition Insert a full-screen background image slide immediately before the specified slide to crea Write batch_manage_slides Apply multiple slide operations (insert/replace/delete/move) to a Marp file in a single fi Write create_presentation Create a new Marp presentation file in one step — initializes frontmatter, adds a title sl Write generate_agenda Auto-generate an agenda slide from section slides (detected by CSS class) and insert it be Write generate_slide_ids Assign stable UUID slide IDs to every slide in a Marp file. Write manage_slide Insert, replace, or delete slides in a Marp file using slide IDs. Write set_frontmatter Initialize or update required Marp frontmatter (marp:true, theme, header, paginate) and in Read list_layouts List all available slide layouts with their required/optional parameters.

All 11 Marp MCP Server tools →

Write tools on other servers

M-Team MCP Server download_torrent YouTube MCP Server generate_video_title Android Forensics ADB MCP Server combine_reports 0xarchive web3_signup

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about export_slide

What does the export_slide tool do? +

Export a Marp markdown presentation to HTML, PDF, or PPTX using marp-cli. It is categorised as a Write tool in the Marp 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 export_slide? +

Register the Marp MCP Server MCP server in PolicyLayer and add a rule for export_slide: 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 Marp MCP Server. Nothing to install.

What risk level is export_slide? +

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

Can I rate-limit export_slide? +

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

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

export_slide is provided by the Marp MCP Server MCP server (masaki39/marp-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Marp MCP Server tool call.

Start from Marp MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →