Find email addresses for a business. Scrapes website, generates pattern candidates, verifies via SMTP. Hunter.io replacement — no API key needed.
AI agents call find_emails to retrieve information from Prospector MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool gathers email intelligence through passive reconnaissance (web scraping, SMTP verification checks). While web scraping has some ethical/legal considerations, the technical action performed is information retrieval with no state mutation, code execution, or destructive capability. It falls squarely into the Read category.
From the tool's definition Tool 'finds and verifies business email addresses' through 'scrapes website, generates pattern candidates, verifies via SMTP' — operations that retrieve and query email data without modifying, deleting, or executing arbitrary code.
Attacks that exploit this kind of access
Find email addresses for a business. Scrapes website, generates pattern candidates, verifies via SMTP. Hunter.io replacement — no API key needed. It is categorised as a Read tool in the Prospector MCP MCP Server, which means it retrieves data without modifying state.
Register the Prospector MCP server in PolicyLayer and add a rule for find_emails: 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 Prospector MCP. Nothing to install.
find_emails 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 find_emails 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 find_emails. 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.
find_emails is provided by the Prospector MCP server (josiebot26/prospector-mcp-email-finder). 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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