find_empty_notes

THE RISK

Low Risk

Why find_empty_notes needs a policy

This tool performs a non-destructive query of the knowledge base to identify empty notes. It has no capability to modify, delete, or execute operations—it only reads and returns data. The blast radius of misuse is minimal: an AI agent could only discover which notes are empty, with no impact on vault integrity or data.

From the tool's definition Tool name 'find_empty_notes' and description 'List notes with no content' indicate a query/search operation that retrieves information about vault state without modification or side effects.

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

POLICY

How to control find_empty_notes

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "find_empty_notes": {}
  }
}

find_empty_notes is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register 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.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about find_empty_notes

What does the find_empty_notes tool do? +

List notes with no content. It is categorised as a Read tool in the Obsidian MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on find_empty_notes? +

Register the Obsidian MCP Server MCP server in PolicyLayer and add a rule for find_empty_notes: 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 Server. Nothing to install.

What risk level is find_empty_notes? +

find_empty_notes is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit find_empty_notes? +

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

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

find_empty_notes is provided by the Obsidian MCP Server MCP server (kynlos/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 Obsidian MCP Server tool call.

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

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