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

Annotations already cover readOnlyHint=true, destructiveHint=false, openWorldHint=true, so the safety profile is known. The description adds useful payload context (clock in/out, breaks, labor hours and cost, tips, approval state) beyond annotations, but does not mention the GET path being idempotent simply because it repeats the URL.

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 compact clauses: what the tool returns and the endpoint path. Front-loaded with the resource and its contents, no filler. Could be slightly tighter by dropping the path which duplicates the schema.

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 2-param read with no output schema, the description covers the returned fields adequately and annotations cover safety. However, it omits pagination/error semantics and does not identify sibling alternatives, leaving minor gaps for an agent choosing between timecard tools.

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 coverage is 100% and both parameters are documented with descriptions (timecard_id, location_uuid with source hint). The description adds little beyond the schema; the 'by id' phrasing only weakly maps to the timecard_id parameter.

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?

States a specific verb+resource: one timecard of a location by id, and lists the returned fields. It distinguishes itself implicitly from list_timecards and list_deleted_timecards by 'one ... by id', though it doesn't explicitly name those siblings.

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 'get one by id' framing implies when to use it over list_timecards, but no explicit when-to-use or when-not-to-use is stated. No prerequisites or exclusions are given.

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