remove_note_type_field

THE RISK

Critical Risk

Removing a field from a note type is a destructive operation that cannot be trivially undone. It alters the underlying data model and could result in loss of information stored in that field across all notes using that note type.

From the tool's definition Tool name explicitly states 'remove_note_type_field' - the word 'remove' indicates deletion. The description confirms 'Removes an existing field from a note type,' which is an irreversible operation that destroys schema structure and potentially associated…

Documented attack patterns abuse exactly the kind of access remove_note_type_field gives an agent:

HOW TO CONTROL REMOVE_NOTE_TYPE_FIELD

PolicyLayer is an MCP gateway — it sits between your AI agents and Anki MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for remove_note_type_field:

policy.json

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

remove_note_type_field disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

Create a free account and register Anki MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

More Anki MCP Server tools

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All 22 Anki MCP Server tools →

Destructive tools on other servers

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Go deeper

Critical-risk tools in Anki MCP Server → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

What does the remove_note_type_field tool do? +

Removes an existing field from a note type. It is categorised as a Destructive tool in the Anki MCP Server 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 remove_note_type_field? +

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

remove_note_type_field 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 remove_note_type_field? +

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

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

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

Enforce policy on every Anki MCP Server tool call.

Deterministic rules across all 22 Anki MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

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22 Anki MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.

// WHAT REMOVE_NOTE_TYPE_FIELD ON ANKI MCP SERVER DOES

// THE RISK

// HOW TO CONTROL REMOVE_NOTE_TYPE_FIELD

// EXPLORE