This record as markdown: /tools/io-tinyfn-tinyfn/cidr-info.md
What cidr_info does on TinyFn
AI agents call cidr_info to retrieve information from TinyFn without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
cidr | string | Yes | CIDR notation (e.g., 192.168.1.0/24) |
Parameters from the server's own tool schema.
Why cidr_info is rated Low
This tool merely retrieves and returns information about CIDR (Classless Inter-Domain Routing) network ranges, such as subnet masks, IP counts, or address details. It is a passive informational lookup with no side effects, consistent with other deterministic tools on the TinyFn server (math, conversion, validation, encoding). No data is modified, deleted, executed, or altered.
From the tool's definition Tool name 'cidr_info' and description 'Get information about a CIDR range' indicate a read-only query operation that retrieves network information without modifying, executing code, or causing destructive effects.
Attacks that exploit this kind of access
The rule that runs cidr_info safely
PolicyLayer is an MCP gateway: it sits between your AI agents and TinyFn, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For cidr_info, this is the rule to start with:
cidr_info is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect TinyFn, apply this rule, and every cidr_info call is checked against it from then on.
Questions about cidr_info
Get information about a CIDR range. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
cidr_info accepts 1 parameter: cidr. Required: cidr. The full parameter table on this page comes from the server's own tool schema.
Register the TinyFn 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 TinyFn. 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 TinyFn MCP server (https://api.tinyfn.io/mcp/all/). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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