check_healthchecks
Check Healthchecks.io (self-hosted) cron job monitoring reachability via GET /. Returns 200 when service is up. Default port 8000.
This record as markdown: /tools/aaronckj-mcp-nettools/check-healthchecks.md
What check_healthchecks does on Mcp Nettools
AI agents call check_healthchecks to retrieve information from Mcp Nettools without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why check_healthchecks is rated Low
This tool performs a simple HTTP GET request to monitor service availability. It retrieves status information about whether a Healthchecks.io service is reachable, with no capability to modify data, execute code, delete resources, or commit financial actions. The blast radius is minimal—a false positive/negative health check result might trigger unnecessary alerts but cannot damage systems or data.
From the tool's definition Tool checks service reachability via GET request and returns status code (200 when up). The GET method and read-only nature of health/reachability checks indicate no modifications or side effects.
Attacks that exploit this kind of access
The rule that runs check_healthchecks safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp Nettools, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For check_healthchecks, this is the rule to start with:
check_healthchecks is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Mcp Nettools, apply this rule, and every check_healthchecks call is checked against it from then on.
Questions about check_healthchecks
Check Healthchecks.io (self-hosted) cron job monitoring reachability via GET /. Returns 200 when service is up. Default port 8000. It is categorised as a Read tool in the Mcp Nettools MCP Server, which means it retrieves data without modifying state.
Register the Mcp Nettools MCP server in PolicyLayer and add a rule for check_healthchecks: 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 Mcp Nettools. Nothing to install.
check_healthchecks is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the check_healthchecks 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.
Set action: deny in the PolicyLayer policy for check_healthchecks. 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.
check_healthchecks is provided by the Mcp Nettools MCP server (aaronckj/mcp-nettools). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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