AI agents use create-deck to create or update resources in Clanki — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Clanki environment.
This tool creates new data (a deck) in a reversible manner. Users can delete decks if needed, making this a Write operation rather than Destructive. The blast radius is minimal—creating an unwanted deck causes no harm to existing data and can be easily undone. Severity is low because the impact is confined to the user's local Anki collection.
From the tool's definition Tool name is 'create-deck' and description states 'Create a new Anki deck', which creates a new data structure (deck) in the Anki application.
Documented attack patterns abuse exactly the kind of access create-deck gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Clanki, and nothing reaches the server without passing your rules. This is the rule we recommend for create-deck:
{
"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.
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Create a new Anki deck. It is categorised as a Write tool in the Clanki MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Clanki 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 Clanki. Nothing to install.
create-deck is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
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.
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.
create-deck is provided by the Clanki MCP server (jasperket/clanki). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Clanki, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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5 Clanki tools catalogued and risk-classified — across an index of 43,000+ MCP servers.