This record as markdown: /tools/io-tinyfn-tinyfn/tan.md
What tan does on TinyFn
AI agents call tan 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 |
|---|---|---|---|
angle | number | Yes | Angle in radians |
Parameters from the server's own tool schema.
Why tan is rated Low
This is a deterministic mathematical function that reads an input value and returns a computed result. It performs no I/O, does not modify any state, does not execute code or shell commands, and does not delete or move resources. It is safely categorized as Read, with low severity since misuse poses no risk to systems or data.
From the tool's definition Tool name 'tan' and description 'Calculate the tangent of an angle' indicate a pure mathematical computation with no side effects, data modification, or external operations.
Attacks that exploit this kind of access
The rule that runs tan 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 tan, this is the rule to start with:
tan 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 tan call is checked against it from then on.
Questions about tan
Calculate the tangent of an angle. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
tan accepts 1 parameter: angle. Required: angle. 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 tan: 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.
tan 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 tan 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 tan. 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.
tan 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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