cidr_to_netmask
Convert CIDR prefix length to subnet mask.
This record as markdown: /tools/io-tinyfn-tinyfn/cidr-to-netmask.md
What cidr_to_netmask does on TinyFn
AI agents call cidr_to_netmask 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 |
|---|---|---|---|
prefix | integer | Yes | CIDR prefix length (0-32) |
Parameters from the server's own tool schema.
Why cidr_to_netmask is rated Low
This tool performs a straightforward data conversion operation (CIDR notation to subnet mask format), common in networking utilities. It retrieves no external data, modifies nothing, executes no code, and causes no state changes. It fits the 'Read' category as a data transformation with no side effects. Severity is low because misuse poses no security risk—the output is always a valid subnet mask regardless of input.
From the tool's definition Tool name 'cidr_to_netmask' and description 'Convert CIDR prefix length to subnet mask' indicate a pure conversion/transformation function with no side effects. This is a deterministic mathematical utility that reads input and returns transformed data.
Attacks that exploit this kind of access
The rule that runs cidr_to_netmask 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_to_netmask, this is the rule to start with:
cidr_to_netmask 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_to_netmask call is checked against it from then on.
Questions about cidr_to_netmask
Convert CIDR prefix length to subnet mask. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
cidr_to_netmask accepts 1 parameter: prefix. Required: prefix. 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_to_netmask: 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_to_netmask 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_to_netmask 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_to_netmask. 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_to_netmask 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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