spotify_play

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

No annotations exist, so the description carries full behavioral burden. It conveys only that playback starts or resumes; it omits the Spotify-specific requirement of an active device (which device_id addresses), any authentication/premium implications, and what happens when playback is already active.

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?

A single short sentence with the action front-loaded and zero filler. It is efficient, though the brevity leaves room that could have been spent on device/usage context.

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 playback-mutating tool with no annotations and no output schema, the description should at least note the active-device prerequisite and typical failure modes. Instead it provides only the surface action, leaving meaningful operational gaps.

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%: the uri field already documents supported URI formats and even points to the search tool, and device_id is labeled optional. The description adds nothing beyond that, 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 ('Start or resume playback') plus the resource kinds accepted (track, album, artist, playlist). An agent can immediately distinguish this from siblings like spotify_pause, spotify_next, and spotify_transfer_playback.

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 phrase 'start or resume' implies the tool is used to initiate or continue playback, but there is no explicit when-to-use guidance, no mention of the need for an active device, and no routing to alternatives such as spotify_transfer_playback when no device is active.

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