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

There are no annotations, and the description does not disclose whether the tool is read-only, what side effects (if any) it has, or how it handles the provided parameters. The schema descriptions hint that parameters are 'discarded' or 'checked', but the main description gives no behavioral transparency.

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 brief at one sentence, which is concise in length but not in effectiveness. It lacks essential information about the tool's operation and parameters, so the brevity is a deficiency rather than a strength.

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 unexpectedly complex input schema and the surrounding sibling tools, the description is severely incomplete. It does not address why the tool accepts these parameters or how they relate to the stated purpose, leaving the agent without enough context to use the tool correctly.

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 lists nine parameters with descriptions that are clearly unrelated to retrieving a UTC timestamp (e.g., 'Git ref name', 'HTTPS URL', 'City name'). These appear to be placeholders, and the description does not explain why they exist or how they affect the result, making the parameter semantics 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 'Current UTC timestamp' is a noun phrase rather than an action, and the tool name 'utc-time' is the primary clue to its function. It does not clearly state what the tool does, such as 'Returns' or 'Gets', and the presence of nine unrelated parameters further obscures the purpose.

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?

No guidance is given about when to use this tool versus any alternative. The description lacks any context, such as typical use cases or distinctions from other time-related tools like 'timezone' or 'iana-zones'.

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