List supported payment methods for shipments (Cash/NonCash) matching the Common/getPaymentForm directory from doc 1.7, which notes that non-cash payments are only available to customers with a Nova Poshta contract.
AI agents call reference_get_payment_methods to retrieve information from Novaposhta without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns information about payment methods supported by the service. It performs a read-only operation that retrieves reference data without side effects, modifying data, executing commands, or affecting financial transactions. The act of listing payment methods is informational only.
From the tool's definition Tool name contains 'get' and description states it 'List supported payment methods' with no modification, deletion, or execution of operations. It retrieves reference data about available payment options.
Attacks that exploit this kind of access
List supported payment methods for shipments (Cash/NonCash) matching the Common/getPaymentForm directory from doc 1.7, which notes that non-cash payments are only available to customers with a Nova Poshta contract. It is categorised as a Read tool in the Novaposhta MCP Server, which means it retrieves data without modifying state.
Register the Novaposhta MCP server in PolicyLayer and add a rule for reference_get_payment_methods: 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 Novaposhta. Nothing to install.
reference_get_payment_methods 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 reference_get_payment_methods 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 reference_get_payment_methods. 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.
reference_get_payment_methods is provided by the Novaposhta MCP server (@shopana/novaposhta-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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