create_deck · Anki MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_deck does on Anki MCP Server

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

WHY IT NEEDS A POLICY

Why create_deck needs a policy

This tool creates data (a new deck) but the operation is reversible—decks can be deleted or modified later. It fits the Write category (creates or modifies data reversibly). Severity is low because creating flashcard decks has minimal blast radius; the worst case is organizational clutter or wasted storage space, not data loss or financial impact.

From the tool's definition Tool creates a new Anki deck, which is a reversible operation. The description states 'Create a new Anki deck' with no mention of deletion or irreversible effects.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_deck Rate-limited

create_deck 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": {
    "create_deck": {
      "limits": [
        {
          "counter": "create_deck_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 Anki MCP Server, so you can run agents against it safely.

FAQ

Questions about create_deck

What does the create_deck tool do? +

Create a new Anki deck. It is categorised as a Write tool in the Anki 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 create_deck? +

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

What risk level is create_deck? +

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

Can I rate-limit create_deck? +

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

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

create_deck is provided by the Anki MCP Server MCP server (raghupalash/anki.mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.