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

No annotations are provided, and the description does not state whether the tool is read-only, performs network access, or has side effects. Some parameter descriptions mention values being 'discarded' or 'no disk access', but these are scattered and do not clarify the tool's overall 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 very short and front-loaded with the resource name, but it omits the verb and key usage details. It is concise but at the expense of clarity, so it only partially earns its place.

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?

There is no output schema and no description of return values, expected behavior, or error conditions. With nine optional parameters and no required ones, the tool's interface is highly ambiguous and incomplete from a caller's perspective.

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?

Although all parameters have descriptions, most are unrelated to the stated timezone purpose (e.g., ref, url, city, feed, host, json, path, query). Only 'zone' directly aligns with the tool's description, and the descriptions for the other parameters do not explain why they exist in a timezone-name tool.

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 is a noun phrase ('Common IANA timezone names for clock calls') and lacks a verb or explicit action, so it is unclear whether the tool lists, validates, or resolves timezone names. It also does not differentiate itself from the sibling 'timezone' tool, making its specific purpose ambiguous.

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 like 'timezone' or 'utc-time'. There is no mention of scenarios, prerequisites, or conditions that would make this tool the appropriate choice.

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