This record as markdown: /tools/io-tinyfn-tinyfn/to-roman.md
What to_roman does on TinyFn
AI agents call to_roman 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 |
|---|---|---|---|
number | integer | Yes | Number to convert (1-3999) |
Parameters from the server's own tool schema.
Why to_roman is rated Low
This is a deterministic conversion utility that reads a numeric input and returns a formatted string representation. It performs no I/O, does not modify any state, and cannot be misused to access, modify, or delete data. It aligns with the Read category of tools that retrieve or transform data without side effects. Severity is low as misuse poses minimal risk.
From the tool's definition Tool name 'to_roman' and description 'Convert number to Roman numerals' indicate a pure data transformation/conversion operation with no side effects.
Attacks that exploit this kind of access
The rule that runs to_roman 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 to_roman, this is the rule to start with:
to_roman 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 to_roman call is checked against it from then on.
Questions about to_roman
Convert number to Roman numerals. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
to_roman accepts 1 parameter: number. Required: number. 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 to_roman: 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.
to_roman 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 to_roman 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 to_roman. 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.
to_roman 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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