Gets a list of domains on the system, including their descriptions.
AI agents call list_domains to retrieve information from MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns information about domains without creating, modifying, deleting, or executing any operations. It is a simple data retrieval operation with minimal blast radius if misused by an AI agent.
From the tool's definition Tool name 'list_domains' and description 'Gets a list of domains on the system, including their descriptions' indicate a retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
Gets a list of domains on the system, including their descriptions. It is categorised as a Read tool in the MCP Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Server MCP server in PolicyLayer and add a rule for list_domains: 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 Server. Nothing to install.
list_domains 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_domains 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_domains. 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_domains is provided by the MCP Server MCP server (node-in-layers/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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