get_attachment_references

THE RISK

Low Risk

Why get_attachment_references needs a policy

This tool searches for and returns information about which notes reference a given attachment. It performs a read-only lookup operation with no side effects, data creation, modification, deletion, or code execution. The blast radius of misuse is minimal—an attacker could only discover metadata about vault structure and attachment usage.

From the tool's definition Tool name 'get_attachment_references' and description 'Find which notes use an attachment' indicate a query/search operation that retrieves reference data without modifying anything.

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

POLICY

How to control get_attachment_references

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 get_attachment_references:

policy.json

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

get_attachment_references 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

Related tools and policies

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All 120 Obsidian MCP Server tools →

Read tools on other servers

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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 get_attachment_references

What does the get_attachment_references tool do? +

Find which notes use an attachment. 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 get_attachment_references? +

Register the Obsidian MCP Server MCP server in PolicyLayer and add a rule for get_attachment_references: 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 get_attachment_references? +

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

Can I rate-limit get_attachment_references? +

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

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

get_attachment_references 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.

CHECK YOUR STACK →