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

The annotations indicate read-only and idempotent behavior, and the description does not contradict this. However, the description adds no additional behavioral transparency beyond the annotations, such as side effects or permissions.

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, concise sentence that is front-loaded with the action. It contains no unnecessary words and is easy to parse.

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 schema exists but lacks descriptions, the tool description does not compensate by explaining usage, output, or parameter details. It is too minimal to be considered complete for a developer unfamiliar with the system.

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 parameters (page, query, page_size) are not described in the schema or the tool description. There is no explanation of what 'query' entails or how pagination works, leaving the semantics completely unspecified.

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 lists timesheet entries, using a verb and resource. It distinguishes from sibling list tools by mentioning 'timesheet' specifically, though it could provide more detail about the scope.

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 provided on when to use this tool versus other list tools. It lacks context on appropriate scenarios, such as when to list timesheets vs. other resources.

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