This record as markdown: /tools/io-tinyfn-tinyfn/polygon-centroid.md
What polygon_centroid does on TinyFn
AI agents call polygon_centroid 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 |
|---|---|---|---|
polygon | string | Yes | Polygon vertices as lat1,lon1;lat2,lon2;lat3,lon3... |
Parameters from the server's own tool schema.
Why polygon_centroid is rated Low
This is a deterministic mathematical computation tool that retrieves/calculates geometric properties from input polygon data without modifying any state, creating, deleting, or executing external code. It aligns with the 'Read' category as a calculation utility similar to other math and conversion tools in the TinyFn suite (e.g., absolute_value, add, acres_to_hectares).
From the tool's definition Tool 'polygon_centroid' performs a mathematical calculation (centroid computation) on geometric data with no side effects, mutations, or external operations.
Attacks that exploit this kind of access
The rule that runs polygon_centroid 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 polygon_centroid, this is the rule to start with:
polygon_centroid 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 polygon_centroid call is checked against it from then on.
Questions about polygon_centroid
Calculate centroid of a polygon. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
polygon_centroid accepts 1 parameter: polygon. Required: polygon. 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 polygon_centroid: 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.
polygon_centroid 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 polygon_centroid 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 polygon_centroid. 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.
polygon_centroid 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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