List invoices from Hetzner Cloud.
AI agents call hetzner_list_invoices to retrieve information from OpenCollective MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves invoice data without side effects. While invoices contain financial information, the tool only reads/lists them; it does not create charges, move money, or commit financial obligations. The blast radius of misuse is limited to information disclosure. Severity is low because viewing invoices alone does not directly harm the system or finances.
From the tool's definition Tool name contains 'list' and description states 'List invoices from Hetzner Cloud' — a read-only retrieval operation with no modification, deletion, or financial transaction capability.
Attacks that exploit this kind of access
List invoices from Hetzner Cloud. It is categorised as a Read tool in the OpenCollective MCP Server MCP Server, which means it retrieves data without modifying state.
Register the OpenCollective MCP Server MCP server in PolicyLayer and add a rule for hetzner_list_invoices: 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 OpenCollective MCP Server. Nothing to install.
hetzner_list_invoices 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 hetzner_list_invoices 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 hetzner_list_invoices. 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.
hetzner_list_invoices is provided by the OpenCollective MCP Server MCP server (theepicsaxguy/opencollective-hetzner-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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