List endpoints from a discovered OpenAPI document with optional filtering by tag, method, or path fragment.
AI agents call list_endpoints to retrieve information from MCP OpenAPI 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 enumerates endpoint metadata from an already-discovered OpenAPI specification. It performs no modifications, deletions, or external execution—it simply queries and presents information about available API endpoints. The filtering capabilities are introspective queries, not actions that modify or trigger operations. This is a straightforward Read category tool.
From the tool's definition Tool name 'list_endpoints' combined with description stating it 'List endpoints from a discovered OpenAPI document with optional filtering' indicates data retrieval without side effects.
Attacks that exploit this kind of access
List endpoints from a discovered OpenAPI document with optional filtering by tag, method, or path fragment. It is categorised as a Read tool in the MCP OpenAPI Discovery MCP Server, which means it retrieves data without modifying state.
Register the MCP OpenAPI Discovery MCP server in PolicyLayer and add a rule for list_endpoints: 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 OpenAPI Discovery. Nothing to install.
list_endpoints 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_endpoints 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_endpoints. 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_endpoints is provided by the MCP OpenAPI Discovery MCP server (rekl0w/mcp-openapi-discovery). 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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