List all tools available through the payment gateway with their prices.
AI agents call list_gated_tools to retrieve information from X402 Discovery without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and presents metadata about available gated tools and their associated prices. It performs a read-only query operation with no side effects—it neither executes services, modifies data, nor triggers payments. While the server context involves USDC micropayments, this specific tool only lists information rather than initiating or completing transactions.
From the tool's definition Tool name 'list_gated_tools' and description 'List all tools available through the payment gateway with their prices' indicate a retrieval operation that queries available tools and pricing information without modifying, executing, or committing financial…
Attacks that exploit this kind of access
List all tools available through the payment gateway with their prices. It is categorised as a Read tool in the X402 Discovery MCP Server, which means it retrieves data without modifying state.
Register the X402 Discovery MCP server in PolicyLayer and add a rule for list_gated_tools: 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 X402 Discovery. Nothing to install.
list_gated_tools 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_gated_tools 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_gated_tools. 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_gated_tools is provided by the X402 Discovery MCP server (rplryan/ouroboros). 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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