This record as markdown: /tools/cbrown35-20i-mcp/register-domain.md
What register_domain does on 20i MCP Server
AI agents use register_domain to create or update resources in 20i MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your 20i MCP Server environment.
Why register_domain is rated Medium
This tool creates a new domain registration, which is a write operation (domain registration record is created in 20i systems). Although domain registration inherently involves financial commitment/cost, the tool's direct function is to create a new resource entry, not to process a payment transaction itself. Categorized as Write rather than Financial because the primary action is creating a domain resource.
From the tool's definition Tool description states 'Register a new domain name' — this creates a new domain registration, which is a reversible write operation that modifies the customer's domain portfolio and typically incurs financial obligations.
Attacks that exploit this kind of access
The rule that runs register_domain safely
PolicyLayer is an MCP gateway: it sits between your AI agents and 20i MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For register_domain, this is the rule to start with:
register_domain stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect 20i MCP Server, apply this rule, and every register_domain call is checked against it from then on.
Questions about register_domain
Register a new domain name. It is categorised as a Write tool in the 20i MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the 20i MCP Server MCP server in PolicyLayer and add a rule for register_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 20i MCP Server. Nothing to install.
register_domain is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the register_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 register_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.
register_domain is provided by the 20i MCP Server MCP server (cbrown35/20i-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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