OSINT gathering from public sources
AI agents call theharvester to retrieve information from PenTest MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs reconnaissance and information gathering from public sources, which is a data retrieval operation with no side effects, modifications, or code execution. This is a classic Read operation used in security assessments to gather intelligence about targets from openly available information.
From the tool's definition Tool name is 'theharvester' and description states 'OSINT gathering from public sources'. OSINT (Open Source Intelligence) gathering retrieves publicly available information without modifying or executing code.
Attacks that exploit this kind of access
OSINT gathering from public sources. It is categorised as a Read tool in the PenTest MCP Server MCP Server, which means it retrieves data without modifying state.
Register the PenTest MCP Server MCP server in PolicyLayer and add a rule for theharvester: 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 PenTest MCP Server. Nothing to install.
theharvester 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 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. 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 is provided by the PenTest MCP Server MCP server (mohitsahoo/mcptoolforwebvulnerabilities-). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
theharvester is one line of PenTest MCP Server's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
Teams ship this data inside their own products. See what a licence covers →