suspend-cards · Anki MCP Server MCP: Risk & Policy

WHAT IT DOES

What suspend-cards does on Anki MCP Server

AI agents use suspend-cards 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 suspend-cards needs a policy

Suspension is a reversible modification to card metadata/state rather than deletion. While it affects learning progress tracking, cards and their content remain intact and can be unsuspended. This places it in Write category (reversible modification) rather than Destructive. Severity is medium because an agent could disrupt a user's learning workflow by suspending many cards, but the action is easily undone.

From the tool's definition Tool description states "Suspend cards by their card IDs" which modifies the state of cards (suspended/unsuspended status) in the Anki collection. The sibling tool "unsuspend-cards" confirms that suspension is a reversible state change.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

suspend-cards Rate-limited

suspend-cards 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": {
    "suspend-cards": {
      "limits": [
        {
          "counter": "suspend-cards_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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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 suspend-cards

What does the suspend-cards tool do? +

Suspend cards by their card IDs. 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 suspend-cards? +

Register the Anki MCP Server MCP server in PolicyLayer and add a rule for suspend-cards: 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 suspend-cards? +

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

Can I rate-limit suspend-cards? +

Yes. Add a rate_limit block to the suspend-cards 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 suspend-cards completely? +

Set action: deny in the PolicyLayer policy for suspend-cards. 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 suspend-cards? +

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