system_list_sessions

A read tool on the Hercules MCP server.

SERVERHercules MCP SOURCE0xmihirk/hercules-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/0xmihirk-hercules-mcp/system-list-sessions.md

WHAT IT DOES

What system_list_sessions does on Hercules MCP

AI agents call system_list_sessions to retrieve information from Hercules MCP without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why system_list_sessions is rated Low

The 'list' verb and the naming convention indicate this tool retrieves or queries session data without modifying it. However, in a penetration testing environment, enumeration of sessions could reveal sensitive information about running operations, attack vectors, or system state.

From the tool's definition Tool name contains 'list' which indicates a query/retrieval operation. No description provided. Context suggests it lists active sessions within the containerized Kali Linux environment.

Risk signalsAdmin/system-level operation

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs system_list_sessions safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Hercules MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For system_list_sessions, this is the rule to start with:

system_list_sessions Allowed

system_list_sessions is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "system_list_sessions": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Hercules MCP, apply this rule, and every system_list_sessions call is checked against it from then on.

FAQ

Questions about system_list_sessions

What does the system_list_sessions tool do? +

system_list_sessions is a read tool on the Hercules MCP server. It is categorised as a Read tool in the Hercules MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on system_list_sessions? +

Register the Hercules MCP server in PolicyLayer and add a rule for system_list_sessions: 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 Hercules MCP. Nothing to install.

What risk level is system_list_sessions? +

system_list_sessions is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit system_list_sessions? +

Yes. Add a rate_limit block to the system_list_sessions 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.

How do I block system_list_sessions completely? +

Set action: deny in the PolicyLayer policy for system_list_sessions. 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.

What MCP server provides system_list_sessions? +

system_list_sessions is provided by the Hercules MCP server (0xmihirk/hercules-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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