Gather emails, subdomains, IPs using theHarvester. Sources: google, bing, linkedin, etc. WARNING: Respect privacy and authorization.
AI agents call theharvester_search to retrieve information from Kali Linux Security Tools MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
theharvester_search retrieves and queries publicly available data without side effects—it passively collects OSINT (open-source intelligence) across multiple sources. This is a classic Read operation.
From the tool's definition Tool description states it 'Gather[s] emails, subdomains, IPs using theHarvester' from public sources (google, bing, linkedin, etc.). No modification, deletion, or execution of code/commands is described.
Attacks that exploit this kind of access
Gather emails, subdomains, IPs using theHarvester. Sources: google, bing, linkedin, etc. WARNING: Respect privacy and authorization. It is categorised as a Read tool in the Kali Linux Security Tools MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Kali Linux Security Tools MCP Server MCP server in PolicyLayer and add a rule for theharvester_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 Kali Linux Security Tools MCP Server. Nothing to install.
theharvester_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 theharvester_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 theharvester_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.
theharvester_search is provided by the Kali Linux Security Tools MCP Server MCP server (jesseeikeland/kali-linux-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.
Teams ship this data inside their own products. See what a licence covers →