get_host_dependencies

THE RISK

Low Risk

Why get_host_dependencies needs a policy

This tool retrieves configuration or status data about host dependencies in Nagios Core without creating, modifying, deleting, or executing anything. It is purely informational and has no side effects, placing it squarely in the Read category with low severity.

From the tool's definition Tool name 'get_host_dependencies' and description 'Retrieves host dependencies' indicate a data query operation with no modification capability.

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

POLICY

How to control get_host_dependencies

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_host_dependencies:

policy.json

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

get_host_dependencies 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 Nagios — 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 →

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EXPLORE

Related tools and policies

More Nagios tools

Read get_alerts Retrieves current problematic host and service statuses (alerts) Read get_comment_by_id Retrieves comments for the given comment id Read get_comments Retrieves comments based on the host and service Read get_contacts_for_object Retrieves the list of contacts to inform for an object Read get_downtimes Retrieves the information for the downtimes in the Nagios Host Process Read get_host_status Retrieves status for all hosts or a specific host Read get_hosts_in_group_status Retrieves status for all hosts within a specific host group Read get_nagios_process_info Retrieves the Nagios Core program status from statusjson.cgi

All 17 Nagios tools →

Read tools on other servers

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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_host_dependencies

What does the get_host_dependencies tool do? +

Retrieves host dependencies for the given host. It is categorised as a Read tool in the Nagios MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_host_dependencies? +

Register the Nagios MCP server in PolicyLayer and add a rule for get_host_dependencies: 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.

What risk level is get_host_dependencies? +

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

Can I rate-limit get_host_dependencies? +

Yes. Add a rate_limit block to the get_host_dependencies 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_host_dependencies completely? +

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

get_host_dependencies 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.

Enforce policy on every Nagios tool call.

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

CHECK YOUR STACK →