export_chapter_cbz · Mangadex MCP: Risk & Policy

WHAT IT DOES

What export_chapter_cbz does on Mangadex

AI agents use export_chapter_cbz to create or update resources in Mangadex — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mangadex environment.

WHY IT NEEDS A POLICY

Why export_chapter_cbz needs a policy

This tool writes data to the local filesystem by creating a CBZ (comic book archive) file. It is reversible—the exported file can be deleted—so it does not qualify as Destructive. It performs no code execution, data deletion, or financial operations.

From the tool's definition Tool description states it 'Export[s] an internal MangaDex chapter to a local CBZ file', which creates a new local file artifact. The verb 'export' combined with 'saved path' indicates file creation rather than temporary output.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

export_chapter_cbz Rate-limited

export_chapter_cbz 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": {
    "export_chapter_cbz": {
      "limits": [
        {
          "counter": "export_chapter_cbz_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 Mangadex, so you can run agents against it safely.

FAQ

Questions about export_chapter_cbz

What does the export_chapter_cbz tool do? +

Export an internal MangaDex chapter to a local CBZ file. External-hosted chapters cannot be exported through MangaDex. After calling, prefer reporting only the saved path unless the user asked for more detail. It is categorised as a Write tool in the Mangadex 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_chapter_cbz? +

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

What risk level is export_chapter_cbz? +

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

Can I rate-limit export_chapter_cbz? +

Yes. Add a rate_limit block to the export_chapter_cbz 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_chapter_cbz completely? +

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

export_chapter_cbz is provided by the Mangadex MCP server (kenhendricks00/mangadex-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.