acl_list_peers

List connected MCP peers (other AI tools, databases, services).

SERVERYaver SOURCEyaver-cli

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-kivanccakmak-yaver/acl-list-peers.md

WHAT IT DOES

What acl_list_peers does on Yaver

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

RISK

Why acl_list_peers is rated Low

This tool retrieves information about connected peers in the MCP network. It performs a read-only query of the system's peer connections. Severity is medium rather than low because knowledge of connected services and tools could inform attack surface reconnaissance or lateral movement planning, but the tool itself performs no state changes or execution.

From the tool's definition Tool name 'acl_list_peers' and description 'List connected MCP peers (other AI tools, databases, services)' indicate a retrieval/query operation with no modification capability.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs acl_list_peers safely

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

acl_list_peers Allowed

acl_list_peers 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": {
    "acl_list_peers": {}
  }
}

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

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

FAQ

Questions about acl_list_peers

What does the acl_list_peers tool do? +

List connected MCP peers (other AI tools, databases, services). It is categorised as a Read tool in the Yaver MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on acl_list_peers? +

Register the Yaver MCP server in PolicyLayer and add a rule for acl_list_peers: 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 Yaver. Nothing to install.

What risk level is acl_list_peers? +

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

Can I rate-limit acl_list_peers? +

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

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

acl_list_peers is provided by the Yaver MCP server (yaver-cli). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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