Get the likely email address format for a domain or company (Domain Search API).
AI agents call domain_search to retrieve information from Zerobounce without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and returns information (email address format patterns) for a given domain. It has no side effects, does not modify data, does not execute code or commands, and does not delete or move money. It is a straightforward read/lookup operation typical of query-based tools.
From the tool's definition Tool description states 'Get the likely email address format for a domain or company' which is a retrieval/query operation that returns data about email format patterns without modifying, deleting, or executing code.
Attacks that exploit this kind of access
Get the likely email address format for a domain or company (Domain Search API). It is categorised as a Read tool in the Zerobounce MCP Server, which means it retrieves data without modifying state.
Register the Zerobounce MCP server in PolicyLayer and add a rule for domain_search: 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 Zerobounce. Nothing to install.
domain_search 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 domain_search 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 domain_search. 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.
domain_search is provided by the Zerobounce MCP server (@zerobounce/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
domain_search is one line of Zerobounce's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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