check_playlist_following

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

With no annotations provided, the description carries the full burden and discloses meaningful behavioral traits: fan-out ('fans out one call per playlist'), concurrency limit ('concurrency 5'), and a concrete quota estimate ('🟢 1–50 GETs'). This tells an agent the operation has multiplicative API cost and bounded concurrency — genuinely useful context beyond the schema.

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 short sentences with zero filler: purpose and boundary in sentence one, cost/concurrency behavior in sentence two. Both sentences earn their place and the most decision-relevant facts are front-loaded.

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 fan-out operation with no annotations and no output schema, the description covers the critical operational context: scope, fan-out count, concurrency, and quota impact. It does no explicit read-only label or return-shape hints, but the return of a per-playlist following check is stronglyinferable and the high-stakes cost behavior is fully disclosed.

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 67% but the required parameter playlist_ids is undocumented in the schema. The description compensates by mapping '1–50 playlists' directly to the playlist_ids array bounds (minItems 1, maxItems 50), clarifying that each array entry is one playlist and drives one GET. This adds real meaning to the one parameter that otherwise had none.

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 and resource ('Check if you follow') with a precise scope boundary (1–50 playlists). The playlist focus distinguishes it from siblings like check_following_artists and get_playlist_followers without needing to open either schema.

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 on when to use this tool versus alternatives such as check_following_artists, get_playlist_followers, or check_saved_items. The description implies a batch-following check but never states exclusions or conditions that would route an agent here over a sibling.

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