list_custom_perspectives

THE RISK

Low Risk

Why list_custom_perspectives needs a policy

This tool queries and returns information about custom perspectives without creating, modifying, deleting, or executing any operations. It is a straightforward read operation that retrieves metadata about user-defined views in OmniFocus. The blast radius is minimal—an AI agent misusing this tool would only see perspective definitions, with no ability to alter data or trigger external operations.

From the tool's definition Tool name 'list_custom_perspectives' and description 'List all custom perspectives defined in OmniFocus' indicate a retrieval operation with no modification or side effects.

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

POLICY

How to control list_custom_perspectives

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

policy.json

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

list_custom_perspectives 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 OmniFocus MCP Enhanced — 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 →

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EXPLORE

Related tools and policies

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All 18 OmniFocus MCP Enhanced tools →

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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 list_custom_perspectives

What does the list_custom_perspectives tool do? +

List all custom perspectives defined in OmniFocus. It is categorised as a Read tool in the OmniFocus MCP Enhanced MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_custom_perspectives? +

Register the OmniFocus MCP Enhanced MCP server in PolicyLayer and add a rule for list_custom_perspectives: 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 OmniFocus MCP Enhanced. Nothing to install.

What risk level is list_custom_perspectives? +

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

Can I rate-limit list_custom_perspectives? +

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

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

list_custom_perspectives is provided by the OmniFocus MCP Enhanced MCP server (jqlts1/omnifocus-mcp-enhanced). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every OmniFocus MCP Enhanced tool call.

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

CHECK YOUR STACK →