Lista todas as ferramentas disponíveis no servidor MCP externo
AI agents call proxy_list_tools to retrieve information from MCP Redirect Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a Read operation—it queries and returns information about available tools without side effects. Severity is medium rather than low because enumerating available tools could inform reconnaissance for privilege escalation or lateral movement attacks, though the immediate blast radius is limited to information disclosure.
From the tool's definition Tool name 'proxy_list_tools' and description 'Lista todas as ferramentas disponíveis no servidor MCP externo' (Lists all available tools on the external MCP server) indicates retrieval of tool metadata with no modification or execution.
Attacks that exploit this kind of access
Lista todas as ferramentas disponíveis no servidor MCP externo. It is categorised as a Read tool in the MCP Redirect Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Redirect Server MCP server in PolicyLayer and add a rule for proxy_list_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 MCP Redirect Server. Nothing to install.
proxy_list_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 proxy_list_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 proxy_list_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.
proxy_list_tools is provided by the MCP Redirect Server MCP server (marcos2872/mcp-redirect-server). 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 →