List supported payment protocols (MPP, x402, native) and their capabilities.
AI agents call list_payment_protocols to retrieve information from Tenzro Ledger MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs information retrieval only—it lists protocol metadata and capabilities with no side effects, no data modification, no code execution, and no financial transactions. It is clearly a Read operation. Given the wallet/payments context of the server, the information retrieved is configuration/capability data rather than sensitive financial account details, warranting low severity.
From the tool's definition Tool name and description indicate 'list' operation that retrieves information about supported payment protocols and their capabilities without modifying any data.
Attacks that exploit this kind of access
List supported payment protocols (MPP, x402, native) and their capabilities. It is categorised as a Read tool in the Tenzro Ledger MCP MCP Server, which means it retrieves data without modifying state.
Register the Tenzro Ledger MCP server in PolicyLayer and add a rule for list_payment_protocols: 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 Tenzro Ledger MCP. Nothing to install.
list_payment_protocols 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 list_payment_protocols 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 list_payment_protocols. 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.
list_payment_protocols is provided by the Tenzro Ledger MCP server (https://canton-mcp.tenzro.network/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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