logger · MCP Toolkit MCP: Risk & Policy

WHAT IT DOES

What logger does on MCP Toolkit

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

WHY IT NEEDS A POLICY

Why logger needs a policy

This tool writes log data to files on the filesystem. It creates or appends to log files organized by date. This is a reversible write operation (files can be deleted or overwritten), so it falls under Write rather than Destructive. Severity is low because logging is a benign side effect with minimal blast radius, though an agent could potentially flood disk space or write sensitive data to logs.

From the tool's definition 写入日志到当前工作目录的log目录下,按日期分文件存储 — 'writes logs' to a log directory, stored by date

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

logger Rate-limited

logger 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": {
    "logger": {
      "limits": [
        {
          "counter": "logger_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about logger

What does the logger tool do? +

写入日志到当前工作目录的log目录下,按日期分文件存储. It is categorised as a Write tool in the MCP Toolkit MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on logger? +

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

What risk level is logger? +

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

Can I rate-limit logger? +

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

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

logger is provided by the MCP Toolkit MCP server (zxfgds/mcp-toolkit). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.