server_shell

Execute any shell command on C2 server (bash, no sandbox, full permissions). Use sudo for privileged ops.

SERVERClaude C2 SOURCE0xyg3n/claude-c2

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/0xyg3n-claude-c2/server-shell.md

WHAT IT DOES

What server_shell does on Claude C2

AI agents invoke server_shell to trigger actions in Claude C2. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

RISK

Why server_shell is rated High

This tool permits unrestricted execution of arbitrary shell commands with full system permissions on a remote C2 server. While not inherently destructive, the combination of 'any shell command', 'no sandbox', and 'full permissions' means an agent could easily invoke destructive commands (rm -rf, dd), financial harm (exfiltrate credentials, payment processing), lateral movement, or privilege escalation.

From the tool's definition "Execute any shell command on C2 server (bash, no sandbox, full permissions)" - explicit statement that the tool runs arbitrary shell commands without sandboxing restrictions.

Risk signalsAdmin/system-level operation

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs server_shell safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Claude C2, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For server_shell, this is the rule to start with:

server_shell Rate-limited

server_shell stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "server_shell": {
      "limits": [
        {
          "counter": "server_shell_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Claude C2, apply this rule, and every server_shell call is checked against it from then on.

FAQ

Questions about server_shell

What does the server_shell tool do? +

Execute any shell command on C2 server (bash, no sandbox, full permissions). Use sudo for privileged ops. It is categorised as a Execute tool in the Claude C2 MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on server_shell? +

Register the Claude C2 MCP server in PolicyLayer and add a rule for server_shell: 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 Claude C2. Nothing to install.

What risk level is server_shell? +

server_shell is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit server_shell? +

Yes. Add a rate_limit block to the server_shell 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 server_shell completely? +

Set action: deny in the PolicyLayer policy for server_shell. 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 server_shell? +

server_shell is provided by the Claude C2 MCP server (0xyg3n/claude-c2). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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All 94 Claude C2 tools → High-risk tools on this server →

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Guides

Govern code and CI agents →Agent sandbox →Least privilege for MCP →