Purchase an ENS name — either buy a listed name from a marketplace or register an available name directly on-chain. For AVAILABLE names: Returns a complete registration recipe with contract address, ABI, step-by-step instructions, and a pre-generated secret. Your wallet signs and submits the tran...
Part of the Name Whisper — ENS Intelligence Layer server.
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AI agents call purchase_name to retrieve information from Name Whisper — ENS Intelligence Layer without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though purchase_name only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"purchase_name": {}
}
}See the full Name Whisper — ENS Intelligence Layer policy for all 42 tools.
These attack patterns abuse exactly the kind of access purchase_name gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Purchase an ENS name — either buy a listed name from a marketplace or register an available name directly on-chain. For AVAILABLE names: Returns a complete registration recipe with contract address, ABI, step-by-step instructions, and a pre-generated secret. Your wallet signs and submits the transactions (commit → wait 60s → register). For LISTED names: Searches all marketplaces (OpenSea, Grails) for the best price. If there are MULTIPLE active listings, returns CHOOSE_LISTING status with all options — present these to the user and ask which one they want. When the user chooses, call this tool again with the chosen orderHash to get the buy transaction. The tool auto-detects whether the name is available or listed. You can override with the 'action' parameter.. It is categorised as a Read tool in the Name Whisper — ENS Intelligence Layer MCP Server, which means it retrieves data without modifying state.
Register the Name Whisper — ENS Intelligence Layer MCP server in PolicyLayer and add a rule for purchase_name: 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 Name Whisper — ENS Intelligence Layer. Nothing to install.
purchase_name 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 purchase_name 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 purchase_name. 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.
purchase_name is provided by the Name Whisper — ENS Intelligence Layer MCP server (https://namewhisper.ai/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 42 Name Whisper — ENS Intelligence Layer tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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