List unpaid invoices for a customer. GET /customers/{customerId}/invoices/unpaid. Supports pagination (pageNo, itemPerPage).
AI agents call get_customer_unpaid_invoices to retrieve information from Rebillia MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a data retrieval operation (GET request) that lists unpaid invoices for a customer. It has no side effects, does not create, modify, delete, or execute any operations. It is purely a read operation with pagination support.
From the tool's definition Tool name is 'get_customer_unpaid_invoices' and description states 'List unpaid invoices for a customer' with GET HTTP method. The operation retrieves and queries data without modifying or side effects.
Attacks that exploit this kind of access
List unpaid invoices for a customer. GET /customers/{customerId}/invoices/unpaid. Supports pagination (pageNo, itemPerPage). It is categorised as a Read tool in the Rebillia MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Rebillia MCP Server MCP server in PolicyLayer and add a rule for get_customer_unpaid_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 Rebillia MCP Server. Nothing to install.
get_customer_unpaid_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 get_customer_unpaid_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 get_customer_unpaid_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.
get_customer_unpaid_invoices is provided by the Rebillia MCP Server MCP server (rhinosaas/rebillia-mcp-server). 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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