Change the resolver contract for an ENS name. The resolver is where a name's records live (ETH address, text records, content hash, etc.). Changing the resolver points the name at a different contract. Common use cases: - Migrating to the latest ENS Public Resolver - Pointing to a custom resolv...
Part of the Name Whisper MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents use set_resolver 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_resolver repeatedly, creating or modifying resources faster than any human could review. Intercept'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.
tools:
set_resolver:
rules:
- action: allow
rate_limit:
max: 30
window: 60See the full Name Whisper policy for all 34 tools.
Agents calling write-class tools like set_resolver have been implicated in these attack patterns. Read the full case and prevention policy for each:
Other tools in the Write risk category across the catalogue. The same policy patterns (rate-limit, validate) apply to each.
Change the resolver contract for an ENS name. The resolver is where a name's records live (ETH address, text records, content hash, etc.). Changing the resolver points the name at a different contract. Common use cases: - Migrating to the latest ENS Public Resolver - Pointing to a custom resolver (e.g. for off-chain/CCIP-read resolution) - Fixing a name that has no resolver set Pass "public" as the resolver address to use the ENS Public Resolver (0x231b0Ee14048e9dCcD1d247744d114a4EB5E8E63). WARNING: Records on the old resolver won't be visible after switching. Set up records on the new resolver first, or use the ENS Public Resolver which most names already use.. 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.
Add a rule in your Intercept YAML policy under the tools section for set_resolver. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Name Whisper MCP server.
set_resolver 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_resolver rule in your Intercept 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 Intercept policy for set_resolver. 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_resolver is provided by the Name Whisper MCP server (namewhisper/ens-tools). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Open source. One binary. Zero dependencies.
npx -y @policylayer/intercept