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

There are no annotations provided, and the description does not disclose whether the tool is read-only or has side effects. The description is neutral and does not mislead, but it does not clarify its behavior beyond the basic function.

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 extremely concise, consisting of a single sentence. It is well-structured and to the point, though it omits details about 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 large set of sibling tools, this description is too minimal. It does not explain the extra parameters or clarify that only 'zone' is used, leaving an agent to guess which parameters apply. The lack of output schema also leaves the response format unspecified.

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 schema includes nine parameters, but only 'zone' is relevant to the tool's purpose. The remaining parameters (ref, url, city, feed, host, json, path, query) have descriptions that appear copied from other tools and are unrelated to timezone lookups, making the schema confusing and misleading.

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's function: returning the current time in a named IANA timezone. It is specific and unambiguous, easily distinguishing it from other tools like utc-time.

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 over alternative tools such as utc-time or geo-hint. It lacks any context on use cases or criteria for selection.

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