generate_card · Markdown to Card - MCP工具 MCP: Risk & Policy

WHAT IT DOES

What generate_card does on Markdown to Card - MCP工具

AI agents use generate_card to create or update resources in Markdown to Card - MCP工具 — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Markdown to Card - MCP工具 environment.

WHY IT NEEDS A POLICY

Why generate_card needs a policy

This tool generates and saves image files from markdown input. While it creates new files (Write action), it does not execute arbitrary code, does not delete anything irreversibly, involves no financial operations, and has low blast radius - worst case is disk space consumption or unwanted image files that can be deleted. Severity is low because the side effects are limited and reversible.

From the tool's definition Tool description states it 'Generate and save a markdown card as an image file'. The 'save' action creates new image files on the system, which is a reversible write operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generate_card Rate-limited

generate_card 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": {
    "generate_card": {
      "limits": [
        {
          "counter": "generate_card_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 Markdown to Card - MCP工具, so you can run agents against it safely.

FAQ

Questions about generate_card

What does the generate_card tool do? +

Generate and save a markdown card as an image file. It is categorised as a Write tool in the Markdown to Card - MCP工具 MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on generate_card? +

Register the Markdown to Card - MCP工具 MCP server in PolicyLayer and add a rule for generate_card: 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 Markdown to Card - MCP工具. Nothing to install.

What risk level is generate_card? +

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

Can I rate-limit generate_card? +

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

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

generate_card is provided by the Markdown to Card - MCP工具 MCP server (jasperjeje/mdtcard). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.