AI agents call list-api-endpoints to retrieve information from Openapi without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs discovery/enumeration of API endpoints, which is a read operation with no side effects. It retrieves metadata about available endpoints but does not invoke them, modify data, or trigger external operations. The blast radius is minimal—exposure of endpoint names and metadata poses low risk since it's descriptive information without operational consequences.
From the tool's definition Tool name 'list-api-endpoints' combined with description 'List all available API endpoints' indicates a read-only operation that retrieves or queries data about available endpoints without modifying or executing anything.
Attacks that exploit this kind of access
List all available API endpoints. It is categorised as a Read tool in the Openapi MCP Server, which means it retrieves data without modifying state.
Register the Openapi MCP server in PolicyLayer and add a rule for list-api-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 Openapi. Nothing to install.
list-api-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-api-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-api-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-api-endpoints is provided by the Openapi MCP server (@ivotoby/openapi-mcp-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.
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