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MikeyBeez

MCP Reminders

by MikeyBeez

complete_reminder

Mark reminders as completed by providing the reminder ID to track and manage tasks across AI assistant sessions.

Instructions

Mark a reminder as completed

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
idYesReminder ID

Implementation Reference

  • The core handler function in ReminderManager that marks a reminder as completed by updating its status to 'completed', adding a completion timestamp, saving to JSON file, and returning true on success.
    completeReminder(id: string): boolean {
      const reminder = this.reminders.get(id);
      if (!reminder || reminder.status !== 'active') return false;
      
      reminder.status = 'completed';
      reminder.completed = new Date().toISOString();
      this.saveReminders();
      return true;
    }
  • The MCP dispatch handler for 'complete_reminder' tool calls, which extracts the id argument, calls the core completeReminder method, and formats a response message.
    case 'complete_reminder': {
      const { id } = args as { id: string };
      const success = reminders.completeReminder(id);
      return {
        content: [{ 
          type: 'text', 
          text: success ? `Reminder ${id} marked as completed.` : `Reminder ${id} not found.` 
        }],
      };
    }
  • Input schema definition for the complete_reminder tool, requiring a single 'id' string parameter.
    inputSchema: {
      type: 'object',
      properties: {
        id: {
          type: 'string',
          description: 'Reminder ID'
        }
      },
      required: ['id'],
    },
  • src/index.ts:264-277 (registration)
    Tool registration in the ListTools response, defining name, description, and input schema for complete_reminder.
    {
      name: 'complete_reminder',
      description: 'Mark a reminder as completed',
      inputSchema: {
        type: 'object',
        properties: {
          id: {
            type: 'string',
            description: 'Reminder ID'
          }
        },
        required: ['id'],
      },
    },
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries full burden but only states the action without behavioral details. It doesn't disclose if this requires permissions, what happens to the reminder after completion (e.g., archived, hidden), or any side effects like notifications. For a mutation tool, this is a significant gap.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient sentence with zero waste. It's front-loaded and appropriately sized for a simple tool, making it easy to parse quickly.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a mutation tool with no annotations and no output schema, the description is incomplete. It lacks details on behavior, return values, error cases, or how it interacts with sibling tools. Given the complexity of modifying data, this leaves critical gaps for an agent.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The description adds no parameter information beyond what the schema provides (100% coverage). The schema already documents the 'id' parameter as 'Reminder ID', so the baseline is 3. No additional meaning or context is given for the parameter.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action ('Mark as completed') and resource ('reminder'), making the purpose immediately understandable. It distinguishes from siblings like 'delete_reminder' or 'clear_old_reminders' by focusing on completion rather than removal, though it doesn't explicitly differentiate them.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided on when to use this tool versus alternatives like 'delete_reminder' or 'check_reminders'. The description implies usage for marking reminders as done, but lacks context on prerequisites, timing, or exclusions.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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