marvin_mark_done · Amazing Marvin MCP Server MCP

WHAT IT DOES

What marvin_mark_done does on Amazing Marvin MCP Server

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

WHY IT NEEDS A POLICY

Why marvin_mark_done needs a policy

Marking a task as done is a reversible state change (tasks can typically be unmarked or re-opened in task management systems). This is a write operation—it modifies data but does not delete it, execute arbitrary code, or trigger financial consequences. The reversibility and isolated scope within a single task's status field make this low severity.

From the tool's definition Tool name 'marvin_mark_done' indicates it marks a task as complete/done. Given the sibling tools create tasks (marvin_add_task), retrieve tasks (marvin_get_due_tasks, marvin_get_todays_tasks), and manage tracking (marvin_start_tracking, marvin_stop_tracking),…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

marvin_mark_done Rate-limited

marvin_mark_done 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": {
    "marvin_mark_done": {
      "limits": [
        {
          "counter": "marvin_mark_done_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 Amazing Marvin MCP Server, so you can run agents against it safely.

FAQ

Questions about marvin_mark_done

What does the marvin_mark_done tool do? +

marvin_mark_done. It is categorised as a Write tool in the Amazing Marvin 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 marvin_mark_done? +

Register the Amazing Marvin MCP Server MCP server in PolicyLayer and add a rule for marvin_mark_done: 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 Amazing Marvin MCP Server. Nothing to install.

What risk level is marvin_mark_done? +

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

Can I rate-limit marvin_mark_done? +

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

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

marvin_mark_done is provided by the Amazing Marvin MCP Server MCP server (lucadeleo/amazing-marvin-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.