Get details of a single card by ID (integer) or slot ID (string). Provide either id OR slotId, not both.
AI agents call get_single_card to retrieve information from UniVoucher MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves card details by identifier. It has no ability to modify, delete, create, or execute operations—it only reads and returns information about an existing gift card. No financial transactions occur. The blast radius of misuse is minimal: an attacker could enumerate card details if IDs are predictable, but cannot modify balances, transfer funds, or compromise card integrity through this tool alone.
From the tool's definition Tool name and description indicate retrieval only: 'Get details of a single card by ID (integer) or slot ID (string)'. The verb 'Get' and the fact that it accepts identifiers to retrieve existing card data confirms it performs queries without side effects.
Attacks that exploit this kind of access
Get details of a single card by ID (integer) or slot ID (string). Provide either id OR slotId, not both. It is categorised as a Read tool in the UniVoucher MCP Server MCP Server, which means it retrieves data without modifying state.
Register the UniVoucher MCP Server MCP server in PolicyLayer and add a rule for get_single_card: 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 UniVoucher MCP Server. Nothing to install.
get_single_card 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_single_card 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_single_card. 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_single_card is provided by the UniVoucher MCP Server MCP server (univoucher/univoucher-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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