week_in_review_playlist

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

With zero annotations provided, the description carries the full burden and delivers substantive disclosure: rerun replaces rather than duplicates, quota cost is stated (1-3 reads + 1-3 writes), dry_run is offered as a safety valve, and transformations (dedupe, recency order) are named. It doesn't cover empty-week or failure behavior, but the core side-effect profile is well communicated.

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?

Four short sentences with zero filler: purpose is front-loaded, followed by rerun semantics, quota, and dry_run. Every clause earns its place and conveys distinct actionable information.

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?

Despite having no annotations and no output schema, the description covers purpose, naming convention, transformations, rerun idempotency, quota cost, and the dry-run preview. The main residual gap is return-format behavior, which is partially addressed by the response_format parameter in the schema.

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 100%, so the schema already documents all five parameters with defaults and meaning. The description's mention of 'dry_run previews the tracklist' mildly reinforces the schema but adds no new parameter-level semantics, so the baseline 3 applies.

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 ('Create'), a concrete resource (a 'Week of <date>' playlist), and precise scope ('last 7 days of plays: deduped, ordered by recency'). This clearly distinguishes it from siblings like get_recently_played (read-only fetch), create_playlist (blank playlist), and year_in_review/monthly_listening_report (different aggregation windows).

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?

'Your weekly ritual in one call' gives clear recurring-use context, and 'Rerunning replaces the same playlist's content' explains re-execution behavior. It does not explicitly name alternative tools or exclusion conditions, but the intended invocation scenario is apparent.

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