add_server_config · MCP SSH Tools Server MCP: Risk & Policy

WHAT IT DOES

What add_server_config does on MCP SSH Tools Server

AI agents use add_server_config to create or update resources in MCP SSH Tools Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your MCP SSH Tools Server environment.

WHY IT NEEDS A POLICY

Why add_server_config needs a policy

This tool creates or modifies server configuration entries, which is a Write operation. Severity is high because misconfigured SSH credentials or malicious server entries could enable unauthorized access, lateral movement, or credential theft. The reversibility (configs can be updated/removed) and lack of immediate data destruction place it in Write rather than Destructive.

From the tool's definition Tool name 'add_server_config' and description '动态添加服务器配置' (dynamically add server configuration) indicates creation/modification of configuration data. Sibling tools show this server manages SSH connections and server credentials.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_server_config Rate-limited

add_server_config stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "add_server_config": {
      "limits": [
        {
          "counter": "add_server_config_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches MCP SSH Tools Server, so you can run agents against it safely.

FAQ

Questions about add_server_config

What does the add_server_config tool do? +

动态添加服务器配置. It is categorised as a Write tool in the MCP SSH Tools Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_server_config? +

Register the MCP SSH Tools Server MCP server in PolicyLayer and add a rule for add_server_config: 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 MCP SSH Tools Server. Nothing to install.

What risk level is add_server_config? +

add_server_config is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit add_server_config? +

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

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

add_server_config is provided by the MCP SSH Tools Server MCP server (nwnusun-cool/mcp-server-ssh-tools). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.