delete_note

THE RISK

Critical Risk

Why delete_note needs a policy

This tool irreversibly removes a note from the user's Obsidian vault. Even if moved to trash, it represents permanent deletion of user data that cannot be recovered through normal tool operations. The high severity reflects the potential for an AI agent to inadvertently delete important notes, research, or personal knowledge.

From the tool's definition Tool name is 'delete_note' and description states 'Delete a note'. The description explicitly indicates the note file is 'moved to the vault' (likely meaning trash/recycle), but deletion of notes in a knowledge management system is an irreversible data loss…

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 Obsidian Mcp Pro, 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 Obsidian Mcp Pro — 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 Obsidian Mcp Pro tools

Execute index_vault Build or refresh the embedding index used by Execute query_base Run a Base file Write append_to_note Append text to the end of an existing note without altering prior content. By default, ins Write prepend_to_note Insert content at the top of an existing note Write add_canvas_edge Create a directed edge connecting two existing canvas nodes. Both fromNode and toNode must Write add_canvas_node Add a new node to an Obsidian canvas and persist the updated file. Supports four node type Write create_daily_note Create a daily note for today (or a specific date) in the vault Write create_note Create a new markdown note at the given path with body content and optional YAML frontmatt

All 41 Obsidian Mcp Pro 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 Obsidian Mcp Pro → 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. By default the file is moved to the vault. It is categorised as a Destructive tool in the Obsidian Mcp Pro 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 Obsidian Mcp Pro 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 Obsidian Mcp Pro. 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 Obsidian Mcp Pro MCP server (rps321321/obsidian-mcp-pro). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Obsidian Mcp Pro tool call.

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

CHECK YOUR STACK →