get_monitor

Retrieve a specific monitor configuration by ID from Mackerel. 🔍 USE THIS TOOL WHEN USERS: - Get details of a specific monitor <examples> Get monitor by ID \

ServerMackerel MCP Server
CategoryRead

How to control get_monitor ↓

WHAT IT DOES

What get_monitor does on Mackerel MCP Server

AI agents call get_monitor 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 get_monitor needs a policy

This tool retrieves and queries existing monitor configuration data without modifying, deleting, or executing any operations. It is a straightforward read operation with no side effects, matching the Read category. Severity is low because retrieval of monitoring configurations poses minimal security risk even if misused by an AI agent.

From the tool's definition Tool name is 'get_monitor' and description states 'Retrieve a specific monitor configuration by ID from Mackerel.' The verb 'Retrieve' and the example 'Get monitor by ID' indicate a read-only operation with no side effects.

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

POLICY

How to control get_monitor

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 get_monitor:

policy.json

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

get_monitor 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_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 Read list_alerts Retrieve alerts from Mackerel. 🔍 USE THIS TOOL WHEN USERS: - Check currently active aler

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 get_monitor

What does the get_monitor tool do? +

Retrieve a specific monitor configuration by ID from Mackerel. 🔍 USE THIS TOOL WHEN USERS: - Get details of a specific monitor <examples> Get monitor by ID \. 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 get_monitor? +

Register the Mackerel MCP Server MCP server in PolicyLayer and add a rule for get_monitor: 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 get_monitor? +

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

Can I rate-limit get_monitor? +

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

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

get_monitor 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.