HTTP parameter discovery
AI agents call arjun 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.
HTTP parameter discovery is a reconnaissance technique that identifies available parameters in web applications by testing and analyzing responses. While it involves sending requests to a target, it does not execute arbitrary code, modify data, delete resources, or move money. It is fundamentally a Read operation that queries the target to enumerate its input attack surface.
From the tool's definition Tool name 'arjun' with description 'HTTP parameter discovery' — discovery implies proactive information gathering and reconnaissance without modifying or executing against target systems.
Attacks that exploit this kind of access
HTTP parameter discovery. 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 arjun: 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.
arjun 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 arjun 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 arjun. 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.
arjun 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.
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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