AI agents call hex_decode 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 |
|---|---|---|---|
encoded | string | Yes | Hex string to decode |
Parameters from the server's own tool schema.
This is a deterministic utility function that performs reversible data decoding. It reads input, transforms it, and returns output without modifying any state, creating/deleting data, executing code, or moving resources. It falls clearly into the Read category as a data retrieval and transformation tool.
From the tool's definition Tool name 'hex_decode' and description 'Decode hexadecimal to text' indicate a data transformation/decoding operation with no side effects. It retrieves and converts encoded data to readable text format.
Attacks that exploit this kind of access
Decode hexadecimal to text. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
hex_decode accepts 1 parameter: encoded. Required: encoded. 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 hex_decode: 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.
hex_decode 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 hex_decode 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 hex_decode. 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.
hex_decode 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.
hex_decode 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 →