AI agents call list-servers to retrieve information from MCP Create Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only operation—it queries and returns state information about running servers. There are no side effects, no code execution, no data modification, and no irreversible actions. It is a straightforward information retrieval operation, making it the least risky category. The low severity reflects minimal blast radius even if an agent calls it unexpectedly.
From the tool's definition Tool name 'list-servers' and description 'List all running servers' indicate a query operation that retrieves information about existing servers without modifying, executing, or deleting anything.
Documented attack patterns abuse exactly the kind of access list-servers gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Create Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list-servers:
{
"version": "1",
"default": "deny",
"tools": {
"list-servers": {}
}
}list-servers is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List all running servers. It is categorised as a Read tool in the MCP Create Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Create Server MCP server in PolicyLayer and add a rule for list-servers: 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 Create Server. Nothing to install.
list-servers 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-servers 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-servers. 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-servers is provided by the MCP Create Server MCP server (tesla0225/mcp-create). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 5 MCP Create Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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5 MCP Create Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.