discover-mocs

RECOMMENDED: Start here to explore the vault! Discover MOCs (Maps of Content) - organizational hub notes tagged with #moc that link to related content. MOCs provide a high-level map of the vault\

ServerObsidian MCP Server
CategoryRead

How to control discover-mocs ↓

WHAT IT DOES

What discover-mocs does on Obsidian MCP Server

AI agents call discover-mocs to retrieve information from Obsidian MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

THE RISK

Low Risk

Why discover-mocs needs a policy

This tool discovers and lists organizational hub notes (Maps of Content) within the Obsidian vault. It reads/queries notes tagged with #moc to provide navigation structure. There are no write, execute, or destructive side effects — it is purely a read/discovery operation.

From the tool's definition Discover MOCs (Maps of Content) - organizational hub notes tagged with #moc that link to related content. MOCs provide a high-level map of the vault

Documented attack patterns abuse exactly the kind of access discover-mocs gives an agent:

POLICY

How to control discover-mocs

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 discover-mocs:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "discover-mocs": {}
  }
}

discover-mocs 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

More Obsidian MCP Server tools

Destructive delete-note Delete a note Write write-note Create or update a note Read get-note-metadata Get metadata for a specific note or all notes in the vault Read list-notes List all notes in the vault or a specific directory Read read-note Read the content of a specific note Read search-by-tags Search for notes by tags (supports both frontmatter and inline tags) Read search-by-title Search for notes by their H1 title Read search-vault Search for content in Obsidian vault notes. CRITICAL: Multiple space-separated terms defau

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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 discover-mocs

What does the discover-mocs tool do? +

RECOMMENDED: Start here to explore the vault! Discover MOCs (Maps of Content) - organizational hub notes tagged with #moc that link to related content. MOCs provide a high-level map of the vault\. 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 discover-mocs? +

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

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

Can I rate-limit discover-mocs? +

Yes. Add a rate_limit block to the discover-mocs 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 discover-mocs completely? +

Set action: deny in the PolicyLayer policy for discover-mocs. 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 discover-mocs? +

discover-mocs is provided by the Obsidian MCP Server MCP server (piotr1215/mcp-obsidian). 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 →

Free to start. No card required.

9 Obsidian MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.