AI agents call validate_hex 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 |
|---|---|---|---|
hex_str | string | Yes | Hex string to validate |
Parameters from the server's own tool schema.
This is a validation utility that queries the format of a string and returns a result. It has no side effects, does not modify data, execute code, or trigger operations. It is purely informational/analytical in nature, consistent with other tools on this server like password analysis and checksums.
From the tool's definition Tool name 'validate_hex' and description 'Validate a hexadecimal string' indicate a validation operation that checks input format without modifying data or triggering external effects.
Attacks that exploit this kind of access
Validate a hexadecimal string. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
validate_hex accepts 1 parameter: hex_str. Required: hex_str. 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 validate_hex: 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.
validate_hex 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 validate_hex 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 validate_hex. 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.
validate_hex 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.
validate_hex 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 →