Low Risk

get_decks

Get all deck names from Anki

Part of the Stefanwille Anki server.

get_decks is read-only, but an agent in a loop can still rack up calls and cost. PolicyLayer caps every call before it runs. Live in minutes.

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AI agents call get_decks to retrieve information from Stefanwille Anki without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.

Even though get_decks only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.

Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_decks": {}
  }
}

See the full Stefanwille Anki policy for all 8 tools.

Get this rule live on your own Stefanwille Anki server in minutes. PolicyLayer enforces it on every call, before it runs.

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These attack patterns abuse exactly the kind of access get_decks gives an agent. Each links to the full case and the policy that stops it:

Browse the full MCP Attack Database →

Every attack above starts with a tool call. PolicyLayer checks each one against your policy first, so get_decks only ever does what you allow.

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Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.

What does the get_decks tool do? +

Get all deck names from Anki. It is categorised as a Read tool in the Stefanwille Anki MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_decks? +

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

What risk level is get_decks? +

get_decks is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_decks? +

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

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

get_decks is provided by the Stefanwille Anki MCP server (stefanwille-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 Stefanwille Anki tool call.

Deterministic rules across all 8 Stefanwille Anki tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

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4,600+ MCP servers and 31,000+ tools scanned and risk-classified.

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