AI agents call subnet_info to retrieve information from Net without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries network data (IP prefix/address details) without creating, modifying, deleting, executing code, or initiating financial transactions. It is a pure read operation similar to sibling tools like 'bgp_asn_info', 'dns_lookup', and 'bogon_check' which are all diagnostic/informational in nature.
From the tool's definition Tool name 'subnet_info' and description 'Get detailed information about an IP prefix or address' indicate retrieval of network information with no modification or execution capability.
Attacks that exploit this kind of access
Get detailed information about an IP prefix or address. It is categorised as a Read tool in the Net MCP Server, which means it retrieves data without modifying state.
Register the Net MCP server in PolicyLayer and add a rule for subnet_info: 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 Net. Nothing to install.
subnet_info 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 subnet_info 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 subnet_info. 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.
subnet_info is provided by the Net MCP server (steelcutoatmeal/net-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.
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