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

No annotations are provided, and the description does not disclose any behavioral details such as network access, side effects, or read-only guarantees. The description is too terse to convey any non-obvious behavior.

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 five words with no fluff or redundant information. It efficiently communicates the core function.

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 confusing and irrelevant parameter descriptions, the tool definition is far from complete. The description does not clarify the intended use of the additional parameters or provide sufficient context for an agent to invoke the tool confidently.

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 input schema contains nine parameters, but only 'zone' is relevant to the tool's purpose. Descriptions for other parameters (e.g., 'ref', 'url', 'json') are misleading and unrelated to timezone functionality, leaving the agent with no meaningful guidance for most parameters.

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 returns the current time for a named IANA timezone. However, it does not differentiate itself from sibling tools like 'utc-time' or 'iana-zones', which could cause ambiguity in tool selection.

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 when to use the tool (when needing current time in a specific timezone), but it provides no explicit guidance or comparison with alternatives. There is no mention of when not to use it or how it relates to other time-related tools.

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