create_workspace_uri

THE RISK

Low Risk

Why create_workspace_uri needs a policy

The tool generates a URI string — a read/informational operation that produces a value without modifying any data or triggering side effects. It does not create, modify, delete, or execute anything; it simply constructs a URI for opening a workspace.

From the tool's definition Generate URI to open workspace

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

POLICY

How to control create_workspace_uri

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 create_workspace_uri:

policy.json

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

create_workspace_uri 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 create_workspace_uri

What does the create_workspace_uri tool do? +

Generate URI to open workspace. 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 create_workspace_uri? +

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

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

Can I rate-limit create_workspace_uri? +

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

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

create_workspace_uri 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 →