delete_note

THE RISK

Critical Risk

Why delete_note needs a policy

This tool permanently removes notes from a knowledge base without reversal capability. While the blast radius is somewhat limited to a single vault rather than external systems, the irreversible nature of deletion and potential loss of important knowledge base content justifies the Destructive category and high severity. Confidence is high due to explicit use of 'delete' verb and unambiguous destructive semantics.

From the tool's definition Tool name 'delete_note' combined with description 'Delete a note from the Obsidian vault' explicitly performs irreversible deletion of data.

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

POLICY

How to control delete_note

PolicyLayer is an MCP gateway — it sits between your AI agents and Enhanced Obsidian 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 Enhanced Obsidian 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

Related tools and policies

More Enhanced Obsidian MCP Server tools

Destructive delete_template Delete a template Destructive manage_folder Create, rename, move, or delete a folder in the Obsidian vault Write add_tags Add tags to a note Write apply_template Apply a template to create a new note Write auto_backlink_vault Automatically add backlinks throughout the entire vault by detecting note names in content Write create_note Create a new note in the Obsidian vault Write create_template Create a new template Write move_note Move or rename a note to a new location in the Obsidian vault

All 25 Enhanced Obsidian MCP Server tools →

Destructive tools on other servers

Android Forensics ADB MCP Server create_full_backup 0xarchive web3_revoke_key Frida Game Hacking MCP clear_scan cPanel MCP Server clear_spam_box

Go deeper

Critical-risk tools in Enhanced Obsidian 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.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about delete_note

What does the delete_note tool do? +

Delete a note from the Obsidian vault. It is categorised as a Destructive tool in the Enhanced Obsidian 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 Enhanced Obsidian 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 Enhanced Obsidian 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 Enhanced Obsidian MCP Server MCP server (jianruidutong/obsidian-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Enhanced Obsidian MCP Server tool call.

Start from Enhanced Obsidian MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →