aider_command · Aider MCP WebSocket Server MCP

WHAT IT DOES

What aider_command does on Aider MCP WebSocket Server

AI agents invoke aider_command to trigger actions in Aider MCP WebSocket Server. 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.

WHY IT NEEDS A POLICY

Why aider_command needs a policy

This tool triggers external operations (command execution) whose effects depend on the arguments provided. While Aider is designed for code editing and the workspace is isolated, executing arbitrary commands can have significant side effects including file system modifications, system calls, and unintended consequences. The isolation provides some mitigation, but command execution remains inherently risky.

From the tool's definition Tool description states 'Execute an Aider command in the workspace' — the word 'Execute' combined with 'command' indicates this runs arbitrary commands.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

aider_command Rate-limited

aider_command 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": {
    "aider_command": {
      "limits": [
        {
          "counter": "aider_command_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about aider_command

What does the aider_command tool do? +

Execute an Aider command in the workspace. It is categorised as a Execute tool in the Aider MCP WebSocket Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on aider_command? +

Register the Aider MCP WebSocket Server MCP server in PolicyLayer and add a rule for aider_command: 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 Aider MCP WebSocket Server. Nothing to install.

What risk level is aider_command? +

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

Can I rate-limit aider_command? +

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

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

aider_command is provided by the Aider MCP WebSocket Server MCP server (larock22/aider-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.