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Time MCP Server

Time MCP Server

by fisher1006
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
Hybrid

convert_time

Convert time between timezones using IANA timezone names. Input source timezone, time in 24-hour format, and target timezone to get the converted time.

Instructions

Convert time between timezones

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": {
      "source_timezone": "<source_timezone>",
      "time": "<time>",
      "target_timezone": "<target_timezone>"
    },
    "name": "convert_time"
  }
}

Input Schema

NameRequiredDescriptionDefault
source_timezoneYesSource IANA timezone name (e.g., 'America/New_York', 'Europe/London'). Use 'UTC' as local timezone if no source timezone provided by the user.
timeYesTime to convert in 24-hour format (HH:MM)
target_timezoneYesTarget IANA timezone name (e.g., 'Asia/Tokyo', 'America/San_Francisco'). Use 'UTC' as local timezone if no target timezone provided by the user.

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.6.2

TDQS

C2.9/5.0
Behavior2/5

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

With no annotations provided, the description carries the full burden of behavioral disclosure but offers minimal information. It states what the tool does but doesn't describe how it behaves—no mention of error handling, input validation, timezone database sources, daylight saving time considerations, or output format. For a tool with no annotations, this leaves significant gaps in understanding its operational characteristics.

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 extremely concise—a single, clear sentence that states the core functionality without any fluff. It's front-loaded and wastes no words, making it efficient for quick understanding.

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?

Given the tool's complexity (timezone conversion with no output schema and no annotations), the description is inadequate. It doesn't explain what the tool returns (e.g., converted time format, error messages), how it handles edge cases, or any behavioral traits. With no structured fields to compensate, the description should provide more context to be complete.

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 input schema has 100% description coverage, providing detailed parameter information (e.g., IANA timezone names, 24-hour format, default to UTC). The description adds no additional parameter semantics beyond what's in the schema, so it meets the baseline of 3 for high schema coverage without compensating value.

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 tool's purpose with a specific verb ('convert') and resource ('time between timezones'), making it immediately understandable. However, it doesn't explicitly differentiate from the sibling tool 'get_current_time', which appears to serve a different function (getting current time vs. converting between timezones).

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?

The description provides no guidance on when to use this tool versus alternatives. While the sibling tool 'get_current_time' suggests a different use case, the description doesn't mention it or provide any context about when conversion is needed versus getting current time, nor does it address any prerequisites 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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