batch reverse lookup for .eth names ONLY (does NOT work for .base.eth Basenames)
AI agents call get_names_for_addresses to retrieve information from BaseQL MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a straightforward data retrieval operation—looking up ENS (.eth) names associated with blockchain addresses. It has no write, execute, or destructive capabilities, and involves no financial transactions. The batch lookup nature and read-only access pattern confirm it as a Read category tool with low severity since misuse would only expose publicly available blockchain name data.
From the tool's definition Tool name 'get_names_for_addresses' and description 'batch reverse lookup for .eth names' indicates a query operation that retrieves name-to-address mapping data without modifying state.
Attacks that exploit this kind of access
batch reverse lookup for .eth names ONLY (does NOT work for .base.eth Basenames). It is categorised as a Read tool in the BaseQL MCP Server MCP Server, which means it retrieves data without modifying state.
Register the BaseQL MCP Server MCP server in PolicyLayer and add a rule for get_names_for_addresses: 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 BaseQL MCP Server. Nothing to install.
get_names_for_addresses 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 get_names_for_addresses 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 get_names_for_addresses. 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.
get_names_for_addresses is provided by the BaseQL MCP Server MCP server (jnix2007/baseql-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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