sync_time

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

Annotations already convey that this is a mutation (readOnlyHint=false) and non-destructive (destructiveHint=false). The description adds the detail 'via NTP' but nothing else about side effects, required privileges, or failure behavior. Given the annotations cover the safety profile, the description adds modest value.

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, direct sentence with no filler. It is appropriately sized for the tool's simplicity and front-loads the core action.

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 simple parameterless tool with annotations present, the description is mostly sufficient. It could mention that network access to an NTP server is required or that administrative privileges might be needed, but these are minor omissions given the tool's trivial interface.

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 schema reflects that completely. With no parameters to document, the baseline of 4 is appropriate. The description does not need to elaborate on parameter semantics.

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 action (sync) and the resource (system clock) with the method (via NTP). It is specific and not a tautology. Since there are no sibling tools that perform a similar time-sync function, differentiation is not required, but the description doesn't explicitly contrast with any other tool.

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 the use case (when you need to synchronize the system clock) but does not explicitly state when to use it or exclude alternatives. There are no obvious alternative tools among the siblings, so the lack of explicit guidance is a minor gap.

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