This record as markdown: /tools/io-tinyfn-tinyfn/nth-triangular.md
What nth_triangular does on TinyFn
AI agents call nth_triangular 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 |
|---|---|---|---|
n | integer | Yes | Which triangular number |
Parameters from the server's own tool schema.
Why nth_triangular is rated Low
This is a deterministic mathematical function that computes and returns a triangular number based on an input parameter. It has no capability to modify state, delete data, execute code, or trigger external operations. It is purely computational and falls squarely into the Read category—a retrieval of computed information with no side effects.
From the tool's definition Tool name 'nth_triangular' and description 'Get the nth triangular number' indicate a pure mathematical computation that retrieves/calculates a value with no side effects, no data modification, and no external operations.
Attacks that exploit this kind of access
The rule that runs nth_triangular 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 nth_triangular, this is the rule to start with:
nth_triangular 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 nth_triangular call is checked against it from then on.
Questions about nth_triangular
Get the nth triangular number. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
nth_triangular accepts 1 parameter: n. Required: n. 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 nth_triangular: 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.
nth_triangular 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 nth_triangular 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 nth_triangular. 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.
nth_triangular 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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