attach_server_to_network · Hcloud MCP: Risk & Policy

WHAT IT DOES

What attach_server_to_network does on Hcloud

AI agents use attach_server_to_network to create or update resources in Hcloud — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Hcloud environment.

WHY IT NEEDS A POLICY

Why attach_server_to_network needs a policy

The tool modifies infrastructure configuration by establishing a network connection for a server. This is a reversible Write operation—the attachment can be removed without permanent data loss. It does not delete resources (Destructive), involve payments (Financial), or execute arbitrary code (Execute).

From the tool's definition Tool name 'attach_server_to_network' and description 'Attach a server to a network' indicate a networking configuration modification.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

attach_server_to_network Rate-limited

attach_server_to_network stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "attach_server_to_network": {
      "limits": [
        {
          "counter": "attach_server_to_network_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Hcloud, so you can run agents against it safely.

FAQ

Questions about attach_server_to_network

What does the attach_server_to_network tool do? +

Attach a server to a network. It is categorised as a Write tool in the Hcloud MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on attach_server_to_network? +

Register the Hcloud MCP server in PolicyLayer and add a rule for attach_server_to_network: 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 Hcloud. Nothing to install.

What risk level is attach_server_to_network? +

attach_server_to_network is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit attach_server_to_network? +

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

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

attach_server_to_network is provided by the Hcloud MCP server (xodus-co/hcloud-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.