Retrieves comments based on the host and service
AI agents call get_comments to retrieve information from Nagios without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns existing comment data from Nagios monitoring system without modifying, deleting, or executing any operations. It is a straightforward data retrieval function consistent with other read-only tools on the server (get_alerts, get_host_status, etc.).
From the tool's definition Tool name is 'get_comments' with description 'Retrieves comments based on the host and service'. The verb 'retrieves' indicates a read-only operation with no side effects.
Documented attack patterns abuse exactly the kind of access get_comments gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Nagios, and nothing reaches the server without passing your rules. This is the rule we recommend for get_comments:
{
"version": "1",
"default": "deny",
"tools": {
"get_comments": {}
}
}get_comments is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Retrieves comments based on the host and service. It is categorised as a Read tool in the Nagios MCP Server, which means it retrieves data without modifying state.
Register the Nagios MCP server in PolicyLayer and add a rule for get_comments: 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 Nagios. Nothing to install.
get_comments 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 get_comments 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 get_comments. 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.
get_comments is provided by the Nagios MCP server (prospire-technology-services/nagios-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Nagios, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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17 Nagios tools catalogued and risk-classified — across an index of 43,000+ MCP servers.