create_deck

THE RISK

Medium Risk

Why create_deck needs a policy

This tool creates a new deck, which is a reversible operation. The user can delete or rename the deck later. Creating a deck has no side effects beyond adding a new organizational container to the Anki database. This is a straightforward Write operation with minimal blast radius—the worst case is an unwanted deck that can be easily removed.

From the tool's definition Tool name is 'create_deck' and description states 'Create a new Anki deck'. The verb 'create' indicates data creation.

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

POLICY

How to control create_deck

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_deck": {
      "limits": [
        {
          "counter": "create_deck_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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.

Create a free account and register Anki 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.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Anki MCP Server tools

Destructive delete_note Delete a note Execute sync Trigger a sync between the local Anki collection and AnkiWeb. Fire-and-forget: success mea Write batch_create_notes Create multiple notes at once. IMPORTANT: For optimal performance, limit batch size to 10- Write create_note Create a single note. For multiple notes, use batch_create_notes instead (10-20 notes per Write create_note_type Create a new note type Write update_note Update an existing note Read get_note_info Get detailed information about a note Read get_note_type_info Get detailed structure of a note type

All 12 Anki MCP Server tools →

Write tools on other servers

M-Team MCP Server download_torrent YouTube MCP Server generate_video_title Android Forensics ADB MCP Server combine_reports 0xarchive web3_signup

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

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 (nailuogg/anki-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Anki MCP Server tool call.

Start from Anki 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 →