format_phone
Format a phone number according to country conventions.
This record as markdown: /tools/io-tinyfn-tinyfn/format-phone.md
What format_phone does on TinyFn
AI agents call format_phone 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 | string | Yes | Phone number to format |
country | string | — | Country code (US, UK, DE, FR, etc.) |
Parameters from the server's own tool schema.
Why format_phone is rated Low
This tool takes a phone number as input and returns a formatted version according to country-specific conventions. It is a pure data transformation utility that does not create, modify, delete, or execute anything. It simply reads input and returns formatted output, matching the Read category pattern of retrieval/query operations with no side effects.
From the tool's definition Tool name 'format_phone' and description 'Format a phone number according to country conventions' indicate a transformation/formatting operation with no side effects.
Attacks that exploit this kind of access
The rule that runs format_phone 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 format_phone, this is the rule to start with:
format_phone 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 format_phone call is checked against it from then on.
Questions about format_phone
Format a phone number according to country conventions. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
format_phone accepts 2 parameters: number, country. 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 format_phone: 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.
format_phone 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 format_phone 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 format_phone. 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.
format_phone 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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