create_floating_ip · Hcloud MCP: Risk & Policy

WHAT IT DOES

What create_floating_ip does on Hcloud

AI agents use create_floating_ip 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 create_floating_ip needs a policy

Creating a floating IP is a Write operation—it allocates a new network resource that can be modified or deleted later. While this carries financial implications (Hetzner Cloud charges for floating IPs), the primary effect is resource creation rather than money movement, so Write is more specific than Financial.

From the tool's definition Tool name 'create_floating_ip' and description 'Create a floating IP' indicate the tool creates a new cloud resource (floating IP address). This is a reversible modification operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_floating_ip Rate-limited

create_floating_ip 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": {
    "create_floating_ip": {
      "limits": [
        {
          "counter": "create_floating_ip_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 create_floating_ip

What does the create_floating_ip tool do? +

Create a floating IP. 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 create_floating_ip? +

Register the Hcloud MCP server in PolicyLayer and add a rule for create_floating_ip: 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 create_floating_ip? +

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

Can I rate-limit create_floating_ip? +

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

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

create_floating_ip 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.