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Mini Agent MCP

Mini Agent MCP

by Microbiosis
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
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datetime_info

Retrieve current date/time, format dates using custom patterns, or calculate the difference between two dates.

Instructions

Get current date/time, format a date, or calculate the difference between two dates. Operations: 'now' (current date/time, optional timezone), 'format' (format a date string, requires 'date' and 'format' params), 'diff' (difference between two dates, requires 'date' and 'date2' params). Date format: ISO 8601 (e.g. '2024-01-15') or natural language. Format string uses: YYYY, MM, DD, HH, mm, ss, dddd (day name).

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "operation": "<operation>"
    },
    "name": "datetime_info"
  }
}

Input Schema

NameRequiredDescriptionDefault
dateNoDate string for format/diff operations (ISO 8601 or parseable date)
date2NoSecond date for diff operation
formatNoFormat string for format operation, e.g. 'YYYY-MM-DD HH:mm:ss'
timezoneNoTimezone for 'now' operation, e.g. 'Asia/Shanghai', 'America/New_York'. Defaults to UTC.
operationYesThe datetime operation to perform

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.1

TDQS

A4.3/5.0
Behavior4/5

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

With no annotations, the description fully discloses the tool's behavior: it performs three read-only datetime operations. It specifies input formats (ISO 8601, natural language) and format string patterns, giving the agent clear expectations.

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

Conciseness4/5

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

The description is efficiently structured: it starts with a high-level summary, then breaks down each operation with examples. Each sentence adds value, though it could be slightly more concise.

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

Completeness4/5

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

For a tool with 5 parameters, three operations, and no output schema, the description covers input formats, required parameters per operation, and format string components. It is nearly complete, leaving little ambiguity.

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

Parameters4/5

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

Although the input schema already describes all parameters (100% coverage), the description adds meaning by explaining the context of each operation, how parameters combine, and the format string syntax. It goes beyond schema descriptions.

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

Purpose5/5

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

The description clearly states the tool's three operations: get current date/time, format a date, and calculate date difference. It distinguishes itself from sibling tools like calculator or random_gen by focusing specifically on datetime operations.

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

Usage Guidelines4/5

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

The description provides explicit instructions for when to use each operation (now, format, diff) and which parameters are required. However, it does not explicitly state when NOT to use this tool or list alternative tools.

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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