List available Vending Machine agents and their capabilities.
AI agents call list_agents to retrieve information from Vending Machine without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and displays information about available agents and their capabilities. It is a pure read operation that queries the vending machine registry without creating, modifying, deleting, or executing any external operations. No sensitive data mutation or system impact occurs.
From the tool's definition Tool name 'list_agents' and description 'List available Vending Machine agents and their capabilities' indicate a query/retrieval operation with no modifications or side effects.
Attacks that exploit this kind of access
List available Vending Machine agents and their capabilities. It is categorised as a Read tool in the Vending Machine MCP Server, which means it retrieves data without modifying state.
Register the Vending Machine MCP server in PolicyLayer and add a rule for list_agents: 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 Vending Machine. Nothing to install.
list_agents 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_agents 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_agents. 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_agents is provided by the Vending Machine MCP server (yokiidesu/vending-machine-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.
Teams ship this data inside their own products. See what a licence covers →