AI agents call cos 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 computation tool that takes an angle as input and returns its cosine value. It performs no data modification, system calls, external operations, or irreversible actions. It is a straightforward read-like operation that queries a mathematical function.
From the tool's definition Tool name 'cos' with description 'Calculate the cosine of an angle.' — a pure mathematical function that retrieves a computed value with no side effects.
Attacks that exploit this kind of access
Calculate the cosine of an angle. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
cos 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 cos: 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.
cos 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 cos 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 cos. 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.
cos 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.
cos 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.
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