delete_decks

A destructive tool on the Anki MCP server.

SERVERAnki SOURCE@arielbk/anki-mcp

Critical RISK CLASS

Category Destructive

Parameters 00 required

Recommended Hiddensee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-arielbk-anki-mcp/delete-decks.md

WHAT IT DOES

What delete_decks does on Anki

AI agents call delete_decks to permanently remove resources in Anki, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.

RISK

Why delete_decks is rated Critical

Deleting decks removes study materials and associated cards/notes permanently. This is a destructive operation (not merely Write) because it cannot be reversed and results in data loss. High severity because a misused agent could destroy a user's study collections. Confidence is high despite empty description because the tool name is explicit and unambiguous.

From the tool's definition Tool name 'delete_decks' indicates irreversible deletion of Anki deck data. No description provided, but the name unambiguously describes a destructive operation that cannot be undone.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs delete_decks 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 delete_decks, this is the rule to start with:

delete_decks Hidden

delete_decks is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "delete_decks"
  ]
}

RESTRICT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about delete_decks

What does the delete_decks tool do? +

delete_decks is a destructive tool on the Anki MCP server. It is categorised as a Destructive tool in the Anki MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on delete_decks? +

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

What risk level is delete_decks? +

delete_decks is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit delete_decks? +

Yes. Add a rate_limit block to the delete_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 delete_decks completely? +

Set action: deny in the PolicyLayer policy for delete_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 delete_decks? +

delete_decks 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.

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