complete_reminder · Reminders MCP Server MCP: Risk & Policy

WHAT IT DOES

What complete_reminder does on Reminders MCP Server

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

WHY IT NEEDS A POLICY

Why complete_reminder needs a policy

Completing a reminder is a write operation that modifies the reminder's state. It is reversible and does not delete data (unlike delete_reminder), does not execute arbitrary code (unlike Execute category tools), and poses no financial risk. The low severity reflects that reminder state changes have minimal blast radius even if misused by an AI agent.

From the tool's definition Tool name 'complete_reminder' and description 'Mark a reminder as completed or incomplete' indicate a state change operation that modifies (but does not delete) reminder data. This is reversible—a completed reminder can be marked incomplete again.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

complete_reminder Rate-limited

complete_reminder 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": {
    "complete_reminder": {
      "limits": [
        {
          "counter": "complete_reminder_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 Reminders MCP Server, so you can run agents against it safely.

FAQ

Questions about complete_reminder

What does the complete_reminder tool do? +

Mark a reminder as completed or incomplete. It is categorised as a Write tool in the Reminders 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 complete_reminder? +

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

What risk level is complete_reminder? +

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

Can I rate-limit complete_reminder? +

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

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

complete_reminder is provided by the Reminders MCP Server MCP server (jagadeesh52423/remainders-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.