delete_note

THE RISK

Critical Risk

This tool permanently removes notes without reversibility, which is the defining characteristic of the Destructive category. Although the description is incomplete, the explicit mention of 'Delete a note permanently' provides strong evidence. The severity is high rather than critical because the blast radius is limited to individual notes within a note-taking application, not system-wide or financial impacts.

From the tool's definition Tool name 'delete_note' combined with description 'Delete a note permanently' explicitly indicates irreversible deletion of data.

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

HOW TO CONTROL DELETE_NOTE

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

policy.json

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

delete_note 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 TriliumNext Notes' 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 TriliumNext Notes' MCP Server tools

Write create_note Create a new note in TriliumNext with duplicate title detection. When a note with the same Write manage_attributes Manage note attributes with write operations (create, update, delete). Create labels (tags Write move_note Move a note to a new parent location in the note tree. IMPORTANT: In TriliumNext a note ca Write patch_note Apply targeted patches to a note using one unified batch schema. WORKFLOW: 1) Call get_not Write update_note Update note with support for title-only updates, content overwrite, content append, or fil Read get_note Get a note and its content by ID. Perfect for when someone wants to see what Read list_children_notes List all direct child notes of a given note using a deterministic Trilium search query. Re Read read_attributes Read all attributes (labels and relations) for a note. View existing labels (tags), templa

All 11 TriliumNext Notes' MCP Server tools →

Destructive tools on other servers

Frida Game Hacking MCP clear_scan MegaMemory remove_concept Frida Agent MCP kill_app 1MCP Server mcp_uninstall

Go deeper

Critical-risk tools in TriliumNext Notes' 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 delete_note tool do? +

Delete a note permanently. ONLY use this tool when the user explicitly requests note deletion (e.g.,. It is categorised as a Destructive tool in the TriliumNext Notes' 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 delete_note? +

Register the TriliumNext Notes' MCP Server MCP server in PolicyLayer and add a rule for delete_note: 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 TriliumNext Notes' MCP Server. Nothing to install.

What risk level is delete_note? +

delete_note 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_note? +

Yes. Add a rate_limit block to the delete_note 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_note completely? +

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

delete_note is provided by the TriliumNext Notes' MCP Server MCP server (tan-yong-sheng/triliumnext-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every TriliumNext Notes' MCP Server tool call.

Deterministic rules across all 11 TriliumNext Notes' MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

GOVERN TRILIUMNEXT NOTES' →

Free to start. No card required.

11 TriliumNext Notes' MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.

// WHAT DELETE_NOTE ON TRILIUMNEXT NOTES' MCP SERVER DOES

// THE RISK

// HOW TO CONTROL DELETE_NOTE

// EXPLORE