carapace_log · Carapace MCP Server MCP: Risk & Policy

WHAT IT DOES

What carapace_log does on Carapace MCP Server

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

WHY IT NEEDS A POLICY

Why carapace_log needs a policy

The tool writes a record of completed actions to a log. This is a Write operation (creating log entries). It has no destructive, financial, or execution implications. Misuse has low blast radius — at worst, logs could be flooded or entries falsified, but no system state is irreversibly altered. Confidence is slightly reduced because the description is truncated and the full scope is unclear.

From the tool's definition 'Call this AFTER completing any significant action to record it' — the tool logs/records actions, implying a write to an audit log.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

carapace_log Rate-limited

carapace_log 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": {
    "carapace_log": {
      "limits": [
        {
          "counter": "carapace_log_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 Carapace MCP Server, so you can run agents against it safely.

FAQ

Questions about carapace_log

What does the carapace_log tool do? +

Call this AFTER completing any significant action to record it in the. It is categorised as a Write tool in the Carapace MCP 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 carapace_log? +

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

What risk level is carapace_log? +

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

Can I rate-limit carapace_log? +

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

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

carapace_log is provided by the Carapace MCP Server MCP server (jdesl55/carapace-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.