list_services

Retrieve all services from Mackerel. 🔍 USE THIS TOOL WHEN USERS: - Get a list of services - View service names, memos, and roles <examples> Get all services \

ServerMackerel MCP Server
CategoryRead

How to control list_services ↓

WHAT IT DOES

What list_services does on Mackerel MCP Server

AI agents call list_services to retrieve information from Mackerel MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

THE RISK

Low Risk

Why list_services needs a policy

This tool queries and retrieves service data from a monitoring platform without creating, modifying, deleting, or executing any operations. It is a straightforward read-only operation that presents monitoring metadata to the user.

From the tool's definition Tool name and description: "Retrieve all services from Mackerel" and usage context shows "Get a list of services" and "View service names, memos, and roles" — pure data retrieval with no modification or side effects.

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

POLICY

How to control list_services

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

policy.json

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

list_services 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 Mackerel MCP Server — 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 →

Free to start. No card required.

EXPLORE

Related tools and policies

More Mackerel MCP Server tools

Write update_dashboard Update a specific dashboard by ID in Mackerel. 🔍 USE THIS TOOL WHEN USERS: - Modify dash Read get_alert Retrieve a specific alert by ID from Mackerel. 🔍 USE THIS TOOL WHEN USERS: - Investigate Read get_alert_logs Retrieve logs for a specific alert by ID from Mackerel. 🔍 USE THIS TOOL WHEN USERS: - Vi Read get_dashboard Retrieve a specific dashboard by ID from Mackerel. 🔍 USE THIS TOOL WHEN USERS: - Get det Read get_host_metrics Retrieve metrics data for a specific host from Mackerel. 🔍 USE THIS TOOL WHEN USERS: - G Read get_monitor Retrieve a specific monitor configuration by ID from Mackerel. 🔍 USE THIS TOOL WHEN USER Read get_service_metrics Retrieve metrics data for a specific service from Mackerel. 🔍 USE THIS TOOL WHEN USERS: Read get_trace Retrieve trace data by trace ID from Mackerel for distributed tracing analysis. 🔍 USE TH

All 16 Mackerel MCP Server tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

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_services

What does the list_services tool do? +

Retrieve all services from Mackerel. 🔍 USE THIS TOOL WHEN USERS: - Get a list of services - View service names, memos, and roles <examples> Get all services \. It is categorised as a Read tool in the Mackerel MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_services? +

Register the Mackerel MCP Server MCP server in PolicyLayer and add a rule for list_services: 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 Mackerel MCP Server. Nothing to install.

What risk level is list_services? +

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

Can I rate-limit list_services? +

Yes. Add a rate_limit block to the list_services 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_services completely? +

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

list_services is provided by the Mackerel MCP Server MCP server (mackerelio-labs/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Mackerel MCP Server tool call.

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

CHECK YOUR STACK →

Free to start. No card required.

16 Mackerel MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.