Get current fee percentages for chains
AI agents call get_current_fees 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 real-time fee information from the protocol. It performs a simple data query ('get') with no side effects—no creation, modification, deletion, or execution of code. The data retrieved is informational only and does not enable financial transactions directly. The blast radius of misuse is minimal; an agent could only retrieve fee data it would access legitimately through normal protocol queries.
From the tool's definition Tool name 'get_current_fees' and description 'Get current fee percentages for chains' indicate a retrieval operation that queries existing protocol data without modifying state or triggering external actions.
Attacks that exploit this kind of access
Get current fee percentages for chains. 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_current_fees: 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_current_fees 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_current_fees 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_current_fees. 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_current_fees 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.
Teams ship this data inside their own products. See what a licence covers →