Get information about supported chains
AI agents call get_chains 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 performs a simple informational lookup with no side effects. It returns metadata about supported blockchains (likely chain IDs, names, RPC endpoints, or similar) without modifying state, executing transactions, or committing financial obligations. The blast radius of misuse is minimal — an attacker could only enumerate supported chains, which is typically public information in a decentralized protocol.
From the tool's definition Tool name is 'get_chains' and description states 'Get information about supported chains' — this is a pure query operation that retrieves static or near-static configuration data about blockchain networks supported by the protocol.
Attacks that exploit this kind of access
Get information about supported 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_chains: 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_chains 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_chains 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_chains. 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_chains 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 →