This record as markdown: /tools/io-tinyfn-tinyfn/geometric-mean.md
What geometric_mean does on TinyFn
AI agents call geometric_mean 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 |
|---|---|---|---|
numbers | string | Yes | Comma-separated positive numbers |
Parameters from the server's own tool schema.
Why geometric_mean is rated Low
This is a pure mathematical computation tool. It retrieves/calculates a derived value from inputs without creating, modifying, executing commands, deleting data, or involving financial operations. It falls squarely into the 'Read' category as a deterministic utility function.
From the tool's definition The tool 'geometric_mean' is a mathematical calculation function that computes and returns a result based on input values. It has no side effects, does not modify data, and does not interact with external systems.
Attacks that exploit this kind of access
The rule that runs geometric_mean 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 geometric_mean, this is the rule to start with:
geometric_mean 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 geometric_mean call is checked against it from then on.
Questions about geometric_mean
Calculate geometric mean. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
geometric_mean accepts 1 parameter: numbers. Required: numbers. 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 geometric_mean: 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.
geometric_mean 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 geometric_mean 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 geometric_mean. 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.
geometric_mean 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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