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 discloses that the time is 'localized' (implying timezone awareness) and sourced from the 'host system,' which adds useful context beyond a basic 'get time' statement. However, it doesn't address potential behavioral traits like latency, freshness guarantees, or error conditions.

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 a single, efficient sentence that front-loads the core purpose ('Get the current localized time') and adds clarifying context ('on the host system') without any wasted words. Every element earns its place, making it highly concise and well-structured.

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 the tool's simplicity (0 parameters, no annotations, no output schema), the description is reasonably complete. It specifies the time is 'localized' and from the 'host system,' which covers key context for a time-fetching tool. However, without an output schema, it doesn't detail the return format (e.g., timestamp structure, timezone info), leaving a minor gap.

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 0 parameters, and schema description coverage is 100% (though empty). The description doesn't need to explain parameters, so it meets the baseline of 4 for parameterless tools by focusing on the tool's purpose without redundant parameter details.

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?

The description clearly states the specific action ('Get') and resource ('current localized time on the host system'). It distinguishes this from sibling tools like get_cpu_load or get_system_info by focusing exclusively on time retrieval rather than system metrics or file operations.

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?

The description implies usage for obtaining the current time, but provides no explicit guidance on when to use this tool versus alternatives (e.g., system clock vs. network time, or when timezone accuracy is critical). It doesn't mention prerequisites or exclusions, leaving usage context to inference.

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