Get the list of instances
AI agents call list-instances to retrieve information from Koyeb MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and lists instances without creating, modifying, deleting, or executing any operations. It is a purely informational read operation with minimal blast radius if misused—an attacker could only enumerate existing instances to gain situational awareness, not alter infrastructure or access sensitive data directly.
From the tool's definition Tool name 'list-instances' and description 'Get the list of instances' indicate a query operation with no modification or execution of side effects.
Attacks that exploit this kind of access
Get the list of instances. It is categorised as a Read tool in the Koyeb MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Koyeb MCP Server MCP server in PolicyLayer and add a rule for list-instances: 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 Koyeb MCP Server. Nothing to install.
list-instances 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-instances 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-instances. 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-instances is provided by the Koyeb MCP Server MCP server (samihalawa/mcp-server-koyeb). 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 →