change_deck

A write tool on the Anki MCP server.

SERVERAnki SOURCE@arielbk/anki-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-arielbk-anki-mcp/change-deck.md

WHAT IT DOES

What change_deck does on Anki

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

RISK

Why change_deck is rated Medium

Moving cards between decks is a Write operation—it modifies data state but is reversible (cards can be moved back). It is not Destructive (no deletion or permanent loss), not Execute (no arbitrary command execution), and not Financial. The lack of a description lowers confidence slightly, but the naming and context of related tools support Write classification.

From the tool's definition Tool name 'change_deck' indicates modification of flashcard organization in Anki. While the description is empty, the sibling tools (add_note, add_tags_to_notes, answer_cards) show this server performs reversible data modifications to an Anki collection.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs change_deck safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Anki, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For change_deck, this is the rule to start with:

change_deck Rate-limited

change_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": {
    "change_deck": {
      "limits": [
        {
          "counter": "change_deck_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Anki, apply this rule, and every change_deck call is checked against it from then on.

FAQ

Questions about change_deck

What does the change_deck tool do? +

change_deck is a write tool on the Anki MCP server. It is categorised as a Write tool in the Anki MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on change_deck? +

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

What risk level is change_deck? +

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

Can I rate-limit change_deck? +

Yes. Add a rate_limit block to the change_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 change_deck completely? +

Set action: deny in the PolicyLayer policy for change_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 change_deck? +

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

KEEP EXPLORING

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