reference.list_masks

List approved, hash-bound reference masks and their named review provenance.

SERVERVisionmcp SOURCEjoshuahickscorp/visionmcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/visionmcp/reference.list-masks.md

WHAT IT DOES

What reference.list_masks does on Visionmcp

AI agents call reference.list_masks to retrieve information from Visionmcp without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why reference.list_masks is rated Low

This tool performs a data retrieval operation (list/query) with no reversible or irreversible modifications, code execution, or financial impact. It simply enumerates reference masks and their associated information.

From the tool's definition Tool name 'list_masks' and description 'List approved, hash-bound reference masks and their named review provenance' indicate a retrieval operation that queries and returns existing reference masks and metadata without modification or side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs reference.list_masks safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Visionmcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For reference.list_masks, this is the rule to start with:

reference.list_masks Allowed

reference.list_masks is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "reference.list_masks": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Visionmcp, apply this rule, and every reference.list_masks call is checked against it from then on.

FAQ

Questions about reference.list_masks

What does the reference.list_masks tool do? +

List approved, hash-bound reference masks and their named review provenance. It is categorised as a Read tool in the Visionmcp MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on reference.list_masks? +

Register the Vision MCP server in PolicyLayer and add a rule for reference.list_masks: 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 Visionmcp. Nothing to install.

What risk level is reference.list_masks? +

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

Can I rate-limit reference.list_masks? +

Yes. Add a rate_limit block to the reference.list_masks 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 reference.list_masks completely? +

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

reference.list_masks is provided by the Vision MCP server (joshuahickscorp/visionmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Vision, and thousands of servers like it.

This server

All 376 Vision tools →

Across the catalogue

The MCP Attack Database →

Guides

Roll out MCP under one policy →Data exfiltration →MCP token cost →