AI agents call sin to retrieve information from TinyFn without modifying anything — 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.
This is a deterministic mathematical function that reads an input parameter (angle) and returns a computed result (sine value). It performs no I/O, does not modify data, execute code, delete resources, or commit financial transactions. It is the safest category of tool.
From the tool's definition Tool name 'sin' with description 'Calculate the sine of an angle' indicates a pure mathematical computation that retrieves/returns a calculated value with no side effects, data modification, or external operations.
Attacks that exploit this kind of access
Calculate the sine of an angle. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
sin 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 sin: 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.
sin 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 sin 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 sin. 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.
sin 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.
sin is one line of TinyFn's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
Teams ship this data inside their own products. See what a licence covers →