This record as markdown: /tools/io-tinyfn-tinyfn/validate-domain.md
What validate_domain does on TinyFn
AI agents call validate_domain 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 |
|---|---|---|---|
domain | string | Yes | Domain name to validate |
Parameters from the server's own tool schema.
Why validate_domain is rated Low
This tool performs input validation (checking if a domain name is well-formed) with no side effects, data modification, code execution, or external operations. It retrieves no sensitive data. The worst misuse would be rejection of valid domains or acceptance of invalid ones, neither of which causes harm. It belongs in the Read category as a pure validation/query operation.
From the tool's definition Tool name is 'validate_domain' and description states it 'Validate a domain name.' Validation is a read-only operation that checks format/structure without modifying data or triggering external effects.
Attacks that exploit this kind of access
The rule that runs validate_domain 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_domain, this is the rule to start with:
validate_domain 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 validate_domain call is checked against it from then on.
Questions about validate_domain
Validate a domain name. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
validate_domain accepts 1 parameter: domain. Required: domain. 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_domain: 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_domain 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_domain 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_domain. 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_domain 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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