mcp_server_list

List registered downstream MCP servers.

SERVERLocalAnt SOURCEyuga-hashimoto/localant

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/yuga-hashimoto-localant/mcp-server-list.md

WHAT IT DOES

What mcp_server_list does on LocalAnt

AI agents call mcp_server_list to retrieve information from LocalAnt 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_server_list is rated Low

The verb 'list' and the function of retrieving a read-only enumeration of registered MCP servers clearly falls under the Read category. There is no data modification, code execution, deletion, or financial transaction involved. The blast radius is minimal—an agent querying this information poses no direct risk, though the knowledge of available downstream servers could inform further actions.

From the tool's definition The tool description is 'List registered downstream MCP servers.' This is a query operation that retrieves/lists information about registered servers with no side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs mcp_server_list safely

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

mcp_server_list Allowed

mcp_server_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_server_list": {}
  }
}

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

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

FAQ

Questions about mcp_server_list

What does the mcp_server_list tool do? +

List registered downstream MCP servers. It is categorised as a Read tool in the LocalAnt MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on mcp_server_list? +

Register the LocalAnt MCP server in PolicyLayer and add a rule for mcp_server_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 LocalAnt. Nothing to install.

What risk level is mcp_server_list? +

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

Can I rate-limit mcp_server_list? +

Yes. Add a rate_limit block to the mcp_server_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_server_list completely? +

Set action: deny in the PolicyLayer policy for mcp_server_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_server_list? +

mcp_server_list is provided by the LocalAnt MCP server (yuga-hashimoto/localant). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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