time_getCurrentTime

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

The readOnlyHint annotation already indicates a read-only operation, and the description adds the core behavior of returning UTC time, local time, and timezone. However, it does not disclose additional behavioral traits such as output format, potential delays, or system clock dependencies. This is adequate for a simple read-only tool but not rich in context.

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, clear sentence that front-loads the key action ('Gets') and immediately specifies the returned data (UTC, local time, timezone). It is concise with no redundant or irrelevant 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?

For a tool with no parameters and no output schema, the description provides sufficient context about what is returned. It states the tool retrieves current time in both UTC and local, plus the timezone. While it does not detail the exact return structure, the simplicity of the operation makes this description adequate. The lack of an output schema places the burden on the description, and it meets that need at a high level.

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 the input schema is empty. With no parameters to document, the description does not need to add parameter semantics. According to the rubric, a baseline of 4 applies when there are 0 parameters, and the description does not miss any parameter-related information.

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 tool retrieves the current time in UTC and local time, along with the timezone. The verb 'Gets' and specific resource 'current time' make the purpose explicit, and it distinguishes from sibling tools like time_getCurrentDate and time_getTimeZone by covering both time and timezone in one operation.

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 such as time_getCurrentDate or time_getTimeZone. It does not mention any exclusions or specific contexts, leaving the agent to infer usage solely from the purpose statement.

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