Get Time

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

Annotations already provide key behavioral hints (readOnlyHint=false, openWorldHint=true, idempotentHint=true, destructiveHint=false), so the description doesn't need to repeat these. The description adds minimal context about what 'current time' means, but doesn't elaborate on format, timezone, or other behavioral details beyond the annotations.

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 'Get the current time' is a single, efficient sentence that front-loads the core purpose with zero wasted words. It's appropriately sized for a simple tool with no parameters.

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, annotations covering key behaviors, and an output schema that presumably handles return values), the description is reasonably complete. However, it could slightly improve by hinting at the output format (e.g., timestamp vs. string) since sibling tools suggest varied contexts.

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?

With 0 parameters and 100% schema description coverage, the schema fully documents the lack of inputs. The description doesn't need to add parameter information, so it appropriately avoids redundancy. A baseline of 4 is justified since no parameters exist to explain.

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 'Get the current time' clearly states the verb ('Get') and resource ('current time'), making the purpose immediately understandable. However, it doesn't distinguish this tool from potential sibling tools like 'get_called_tools' or 'get_weather', which prevents a perfect score.

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 provides no guidance on when to use this tool versus alternatives. There are sibling tools like 'get_weather' that might serve related time/weather queries, but the description doesn't mention any context, prerequisites, or exclusions for usage.

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