Busca um refund via GET /api/v1/refund/{id} (refundId ou correlationID).
AI agents call woovi_get_refund to retrieve information from Payments MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves refund information from the payment gateway without modifying, deleting, or executing side effects. It qualifies as a Read operation. Severity is elevated to medium (rather than low) because refund data is sensitive financial information—exposing refund records or metadata to an unauthorized agent could reveal transaction details, refund patterns, or customer payment information.
From the tool's definition Tool name 'woovi_get_refund' and description 'Busca um refund via GET' indicate a retrieval operation using the GET HTTP method. The description explicitly states it searches/fetches ('busca') a refund by ID, with no modification or deletion of data.
Attacks that exploit this kind of access
Busca um refund via GET /api/v1/refund/{id} (refundId ou correlationID). It is categorised as a Read tool in the Payments MCP MCP Server, which means it retrieves data without modifying state.
Register the Payments MCP server in PolicyLayer and add a rule for woovi_get_refund: 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 Payments MCP. Nothing to install.
woovi_get_refund 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 woovi_get_refund 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 woovi_get_refund. 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.
woovi_get_refund is provided by the Payments MCP server (lpillonwp/mcp-payments). 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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