High Risk →

render_markdown

Render markdown text to HTML

How to control render_markdown ↓

What render_markdown does on Forgejo

AI agents invoke render_markdown to trigger actions in Forgejo. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

High Risk

Why render_markdown needs a policy

This tool processes/transforms input by executing a rendering operation on the server side. While it doesn't modify stored data, it executes a transformation operation (markdown to HTML conversion) which may involve server-side processing and could potentially be used to probe server behavior or trigger rendering issues. It's more than a pure read, as it actively processes and transforms content.

From the tool's definition Render markdown text to HTML

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

How to control render_markdown

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

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "render_markdown": {
      "limits": [
        {
          "counter": "render_markdown_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

render_markdown stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

  1. Create a free account and register Forgejo — nothing to install.
  2. Add this policy — paste it, or build it visually.
  3. Point your MCP client (Claude, Cursor, anything) at your gateway URL.
RATE-LIMIT THIS TOOL →

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Related tools and policies

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Questions about render_markdown

What does the render_markdown tool do? +

Render markdown text to HTML. It is categorised as a Execute tool in the Forgejo MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on render_markdown? +

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

What risk level is render_markdown? +

render_markdown is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit render_markdown? +

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

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

render_markdown is provided by the Forgejo MCP server (sqcows/forgejo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Forgejo tool call.

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

Free to start. No card required.

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