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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false. The description adds useful context that the endpoint is a write-style POST used for listing, which explains the apparent mismatch with readOnlyHint, but it does not cover auth requirements, pagination, or return format.

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?

Two sentences, front-loaded with the action and endpoint. The second sentence is somewhat vague but brief, and no filler is present.

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 10-parameter list tool with no output schema, the description is too thin: it doesn't explain how to filter by date or users, pagination, or response shape. Annotations cover safety but parameter usage remains opaque.

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?

Schema description coverage is 50% (5 of 10 parameters), and the description only says 'accepts API-supported body fields', adding no meaning for parameters like from, to, users, or filter. It fails to compensate for the undocumented half.

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 states a specific verb 'Lists' and resource 'user timecards', and names the endpoint POST /timecards/users. It does not differentiate from sibling tools like get_timecard or list_timecard_logs, so it falls short of a 5.

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 when-to-use guidance or alternatives are provided. The note about a write-style POST endpoint is a limitation, not usage advice, so an agent gets no help choosing between this and get_timecard or get_timecards_count.

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