suspend_cards · Anki MCP Data Bridge MCP: Risk & Policy

WHAT IT DOES

What suspend_cards does on Anki MCP Data Bridge

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

WHY IT NEEDS A POLICY

Why suspend_cards needs a policy

Suspending cards is a write operation that changes card state (active → suspended) but is fully reversible (cards can be unsuspended). This is not destructive because the data is not deleted or permanently altered. While it affects learning flow, the action is recoverable and does not meet the threshold of Execute (no code/command execution) or Destructive (not irreversible).

From the tool's definition Tool name is 'suspend_cards' with description 'Suspend cards to temporarily remove them from review' — suspension is a reversible state change that modifies card metadata without permanent deletion.

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 Data Bridge, so you can run agents against it safely.

FAQ

Questions about suspend_cards

What does the suspend_cards tool do? +

Suspend cards to temporarily remove them from review. It is categorised as a Write tool in the Anki MCP Data Bridge 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 Data Bridge 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 Data Bridge. 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 Data Bridge MCP server (stefanspycher/anki-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.