mcp_registry_list

List all servers in the MCP registry, newest first

SERVERMeta Data Mcp SOURCEpypi:meta-data-mcp

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/io-github-derekslinz-meta-data-mcp/mcp-registry-list.md

WHAT IT DOES

What mcp_registry_list does on Meta Data Mcp

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

RISK

Why mcp_registry_list is rated Low

This tool retrieves and displays information about MCP servers from a registry. It is a read-only query operation that does not modify, execute, delete, or affect any external systems. The blast radius of misuse is minimal—an agent could only enumerate available servers, which is non-sensitive metadata discovery.

From the tool's definition Tool name 'mcp_registry_list' and description 'List all servers in the MCP registry, newest first' — performs a list/query operation with no side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs mcp_registry_list safely

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

mcp_registry_list Allowed

mcp_registry_list 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": {
    "mcp_registry_list": {}
  }
}

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

The button opens the PolicyLayer dashboard: create your workspace, connect Meta Data Mcp, apply this rule, and every mcp_registry_list call is checked against it from then on.

FAQ

Questions about mcp_registry_list

What does the mcp_registry_list tool do? +

List all servers in the MCP registry, newest first. It is categorised as a Read tool in the Meta Data Mcp MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on mcp_registry_list? +

Register the Meta Data MCP server in PolicyLayer and add a rule for mcp_registry_list: 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 Meta Data Mcp. Nothing to install.

What risk level is mcp_registry_list? +

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

Can I rate-limit mcp_registry_list? +

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

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

mcp_registry_list is provided by the Meta Data MCP server (pypi:meta-data-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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