Get list of payer types (Sender/Recipient/ThirdPerson) for waybill creation via Common/getTypesOfPayers (doc 1.7). Docs stress the ThirdPerson payer is accessible only after signing a service contract and that the directory should be cached monthly.
AI agents call reference_get_types_of_payers 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 purely retrieves static reference data (payer type enumeration) for use in constructing waybill requests. There are no side effects, no data creation, modification, or deletion, and no execution of external operations. The mention of service contract restrictions and caching guidance are operational notes that do not change the fundamental read-only nature of the operation.
From the tool's definition Tool name contains 'get' and description states it retrieves a 'list of payer types' with no modification or side effects. The function signature references 'Common/getTypesOfPayers', which is a read operation that returns reference data.
Attacks that exploit this kind of access
Get list of payer types (Sender/Recipient/ThirdPerson) for waybill creation via Common/getTypesOfPayers (doc 1.7). Docs stress the ThirdPerson payer is accessible only after signing a service contract and that the directory should be cached monthly. 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_types_of_payers: 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_types_of_payers 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_types_of_payers 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_types_of_payers. 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_types_of_payers 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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