Set the primary ENS name (reverse resolution) for a wallet address. This controls what name is displayed when someone looks up your Ethereum address. For example, instead of seeing "0x1234...abcd", they'd see "myname.eth". Requirements: - You must own or control the ENS name - The name's ETH addr...
Part of the Name Whisper server.
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AI agents use set_primary_name to create or modify resources in Name Whisper. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call set_primary_name repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Name Whisper.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"set_primary_name": {
"limits": [
{
"counter": "set_primary_name_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Name Whisper policy for all 34 tools.
These attack patterns abuse exactly the kind of access set_primary_name gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Set the primary ENS name (reverse resolution) for a wallet address. This controls what name is displayed when someone looks up your Ethereum address. For example, instead of seeing "0x1234...abcd", they'd see "myname.eth". Requirements: - You must own or control the ENS name - The name's ETH address record must point to your wallet - Only the wallet owner can set their own primary name If the ETH address record doesn't match, use set_ens_records first to update it. Only one primary name per address — setting a new one replaces the previous.. It is categorised as a Write tool in the Name Whisper MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Name Whisper MCP server in PolicyLayer and add a rule for set_primary_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. Nothing to install.
set_primary_name 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 set_primary_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 set_primary_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.
set_primary_name is provided by the Name Whisper MCP server (namewhisper/ens-tools). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 34 Name Whisper tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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