AI agents call format_truncate to retrieve information from TinyFn without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
text | string | Yes | Text to truncate |
length | integer | — | Maximum length |
suffix | string | — | Suffix to add when truncated |
Parameters from the server's own tool schema.
This tool performs a purely deterministic text transformation (truncating a string) with no side effects, no data persistence, and no external operations. It reads input text and returns a shortened version, making it a Read/transformation operation with minimal risk.
From the tool's definition Truncate text to a maximum length
Attacks that exploit this kind of access
Truncate text to a maximum length. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
format_truncate accepts 3 parameters: text, length, suffix. 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 format_truncate: 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_truncate 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_truncate 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_truncate. 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_truncate 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.
format_truncate is one line of TinyFn's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
Teams ship this data inside their own products. See what a licence covers →