This record as markdown: /tools/io-tinyfn-tinyfn/metaphone.md
What metaphone does on TinyFn
AI agents call metaphone 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 |
|---|---|---|---|
text | string | Yes | Word to encode |
Parameters from the server's own tool schema.
Why metaphone is rated Low
This tool retrieves or transforms data deterministically without creating, modifying, deleting, or executing external operations. It is a pure computational function that takes input and returns encoded output. No reversible or irreversible changes to system state occur. Classification as Read is appropriate for all encoding/hashing/transformation utilities in this deterministic toolset.
From the tool's definition Tool description: 'Generate Metaphone phonetic encoding.' Metaphone is a phonetic algorithm that converts strings to phonetic codes for comparison purposes.
Attacks that exploit this kind of access
The rule that runs metaphone 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 metaphone, this is the rule to start with:
metaphone 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 metaphone call is checked against it from then on.
Questions about metaphone
Generate Metaphone phonetic encoding. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
metaphone accepts 1 parameter: text. Required: text. 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 metaphone: 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.
metaphone 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 metaphone 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 metaphone. 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.
metaphone 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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