play_album

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

With no annotations provided, the description carries full burden but only states the basic action. It doesn't disclose behavioral traits like whether this requires authentication, affects current playback, has rate limits, or what happens on errors (e.g., if album not found). For a mutation tool with zero annotation coverage, this is a significant gap.

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?

Extremely concise and front-loaded in a single sentence that directly states the tool's purpose. Every word earns its place with no redundant information, making it easy to parse quickly.

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 no annotations, no output schema, and a mutation tool (implied by 'Play'), the description is incomplete. It lacks crucial details like authentication requirements, playback behavior, error handling, or return values, leaving significant gaps for an agent to use it effectively.

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 three parameters (albumName, artistName, deviceId). The description adds minimal value by mentioning 'optional artist' but doesn't provide additional context beyond what's in the schema, such as how artistName helps disambiguate or typical deviceId formats.

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 verb ('Play') and resource ('a Spotify album'), specifying it's by name with optional artist filtering. It distinguishes from siblings like play_playlist, play_track, and play_random_song by focusing on albums, but doesn't explicitly differentiate from other album-related tools (none listed).

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 like play_playlist or play_track, nor any context about prerequisites (e.g., requires active Spotify session). The description implies usage for playing albums but lacks explicit when/when-not instructions or named alternatives.

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