CIDR primitives (IPv4/IPv6): mask, wildcard, usable range, counts.
AI agents call cidr_info to retrieve information from Network 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 calculates network information from CIDR notation. It performs no side effects, creates no connections, modifies no data, and executes no commands. It is purely informational/computational (retrieving derived properties of CIDR blocks), making it a Read operation.
From the tool's definition Tool provides CIDR primitives operations including 'mask, wildcard, usable range, counts'—all read-only calculations that extract information about CIDR blocks without modifying network state or executing operations.
Attacks that exploit this kind of access
CIDR primitives (IPv4/IPv6): mask, wildcard, usable range, counts. It is categorised as a Read tool in the Network MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Network MCP Server MCP server in PolicyLayer and add a rule for cidr_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 Network MCP Server. Nothing to install.
cidr_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 cidr_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 cidr_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.
cidr_info is provided by the Network MCP Server MCP server (labeveryday/network-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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