executeCommand · SiYuan MCP Server MCP: Risk & Policy

WHAT IT DOES

What executeCommand does on SiYuan MCP Server

AI agents invoke executeCommand to trigger actions in SiYuan MCP 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 executeCommand needs a policy

This tool executes arbitrary commands, making it an Execute category tool. The severity is high because command execution can have wide-ranging side effects depending on what commands are run—from reading data to modifying system state. A malicious agent could execute destructive or unintended commands. Confidence is high due to the explicit 'executeCommand' naming and clear command execution semantics.

From the tool's definition Tool name 'executeCommand' with description '执行指定的命令' (execute specified command) indicates arbitrary command execution capability.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

executeCommand Rate-limited

executeCommand 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": {
    "executeCommand": {
      "limits": [
        {
          "counter": "executecommand_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 SiYuan MCP Server, so you can run agents against it safely.

FAQ

Questions about executeCommand

What does the executeCommand tool do? +

执行指定的命令. It is categorised as a Execute tool in the SiYuan MCP 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 executeCommand? +

Register the SiYuan MCP Server MCP server in PolicyLayer and add a rule for executeCommand: 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 SiYuan MCP Server. Nothing to install.

What risk level is executeCommand? +

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

Can I rate-limit executeCommand? +

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

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

executeCommand is provided by the SiYuan MCP Server MCP server (rexding97/siyuan-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.