SpotifyPlayback

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

With no annotations, the description carries the transparency burden. It discloses basic behaviors like 'resumes current playback' for start and 'skips current track' for skip, but omits details on permissions, rate limits, error states (e.g., no active device), and whether get returns current track info or just status.

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 extremely concise: one introductory sentence followed by a bullet list of actions. Every piece of information is front-loaded and relevant. No wasted words.

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 tool's complexity (multi-action playback control) and lack of output schema or annotations, the description is incomplete. It fails to mention prerequisites like an active Spotify device, account type requirements, or error handling. Important operational context is missing.

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 baseline is 3. The tool description does not add significant meaning beyond the schema's parameter descriptions; it repeats the same action list. For example, 'num_skips' and 'spotify_uri' are already explained in the schema.

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 manages current playback and lists four specific actions (get, start, pause, skip). This is a specific verb+resource with clear action breakdown, distinguishing it from sibling tools like SpotifyGetInfo (which likely retrieves broader info) and SpotifyQueue (queue management).

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 description provides no guidance on when to use this tool versus alternatives, nor does it mention prerequisites (e.g., active device) or when not to use it (e.g., if user lacks Premium). Usage context is entirely implicit.

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