validate_hex

Validate a hexadecimal string.

SERVERTinyFn SOURCEhttps://api.tinyfn.io/mcp/all/

Low RISK CLASS

Category Read

Parameters 11 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-tinyfn-tinyfn/validate-hex.md

WHAT IT DOES

What validate_hex does on TinyFn

AI agents call validate_hex 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
`hex_str`	string	Yes	Hex string to validate

Parameters from the server's own tool schema.

RISK

Why validate_hex is rated Low

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

RECOMMENDED RULE

The rule that runs validate_hex 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 validate_hex, this is the rule to start with:

validate_hex Allowed

validate_hex is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "validate_hex": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect TinyFn, apply this rule, and every validate_hex call is checked against it from then on.

FAQ

Questions about validate_hex

What does the validate_hex tool do? +

Validate a hexadecimal string. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.

What parameters does validate_hex accept? +

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.

How do I enforce a policy on validate_hex? +

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.

What risk level is validate_hex? +

validate_hex is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit validate_hex? +

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.

How do I block validate_hex completely? +

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.

What MCP server provides validate_hex? +

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.

KEEP EXPLORING

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