This record as markdown: /tools/io-tinyfn-tinyfn/stone-to-kilograms.md
What stone_to_kilograms does on TinyFn
AI agents call stone_to_kilograms 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 |
|---|---|---|---|
stone | number | Yes | Weight in stone |
Parameters from the server's own tool schema.
Why stone_to_kilograms is rated Low
This is a pure data transformation tool. It takes an input value and returns a converted result without creating, modifying, deleting, or executing anything external. It has no side effects and cannot be misused to cause harm even if called with unexpected arguments—the worst outcome would be an incorrect numerical result. This is the lowest-risk classification.
From the tool's definition Tool is a conversion function ('Convert stone to kilograms') that retrieves or transforms a value with no side effects. It matches the pattern of other deterministic utility tools on this server (acres_to_hectares, add_time, etc.)
Attacks that exploit this kind of access
The rule that runs stone_to_kilograms 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 stone_to_kilograms, this is the rule to start with:
stone_to_kilograms 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 stone_to_kilograms call is checked against it from then on.
Questions about stone_to_kilograms
Convert stone to kilograms. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
stone_to_kilograms accepts 1 parameter: stone. Required: stone. 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 stone_to_kilograms: 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.
stone_to_kilograms 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 stone_to_kilograms 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 stone_to_kilograms. 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.
stone_to_kilograms 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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