get_current_time

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

No annotations are provided, so the description carries full burden. It only states the basic function. It does not disclose any behavioral traits such as rate limits, authentication requirements, or whether the tool is read-only. For a simple time-fetch, this is adequate but minimal, hence a score of 3.

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

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

The description is three sentences long, front-loaded with the core purpose. Every sentence earns its place: first defines what it does, second gives usage context, third distinguishes from siblings. No extraneous information.

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

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

Given no output schema, the description does not explain the return format or content. It would be more complete if it mentioned the time format (e.g., ISO 8601) or any additional details. However, the context signals indicate a simple tool with no parameters, and the description provides adequate context for when to use it relative to siblings.

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

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

The tool has zero parameters, and schema description coverage is 100%. The description adds no parameter information because there are none. For zero-parameter tools, the baseline is 4. The description does not need to add anything beyond what the schema provides.

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

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

Clearly states 'Returns the current server UTC time'. The verb 'returns' and resource 'current server UTC time' are specific. Distinguishes from sibling tools by specifying that for Hijri date, other tools should be used.

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

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

Explicitly states when to use: 'when the user asks about current prayer status, time remaining to next prayer, or any query that requires comparing current time against prayer times'. Also specifies when not to use and provides alternative tools (get_monthly_prayer_times, get_yearly_islamic_events) for Hijri dates. This provides clear guidance and differentiation from siblings.

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