read_slide

THE RISK

Low Risk

Why read_slide needs a policy

This tool only retrieves and queries existing slide data from Marp presentation files. It performs no creation, modification, deletion, or execution of external operations. The operation is read-only with no side effects, fitting squarely into the Read category with minimal risk.

From the tool's definition Tool name 'read_slide' and description states it 'Read slide content from a Marp file. Returns a specific slide by ID, or all slides' — explicitly a retrieval operation with no modifications.

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

POLICY

How to control read_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 read_slide:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "read_slide": {}
  }
}

read_slide is read-only, so it stays allowed — but 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.

CAP 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 export_slide Export a Marp markdown presentation to HTML, PDF, or PPTX using marp-cli. 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

All 11 Marp MCP Server tools →

Read tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about read_slide

What does the read_slide tool do? +

Read slide content from a Marp file. Returns a specific slide by ID, or all slides with their IDs and positions. It is categorised as a Read tool in the Marp MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on read_slide? +

Register the Marp MCP Server MCP server in PolicyLayer and add a rule for read_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 read_slide? +

read_slide is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit read_slide? +

Yes. Add a rate_limit block to the read_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 read_slide completely? +

Set action: deny in the PolicyLayer policy for read_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 read_slide? +

read_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 →