Resume Spotify

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

Annotations already indicate this is a non-read-only, non-destructive, idempotent action, and the description adds the context that it operates on a selected or active device. It does not disclose additional behavior such as what happens if no device is active or whether it fails silently, but with annotation coverage, the description meets the baseline without contradiction.

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 a single, concise sentence of nine words, with no redundancy or extra information. It is front-loaded with the main action and immediately conveys the tool's purpose.

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 simple playback control tool with one optional parameter, the description, combined with annotations (idempotent, non-destructive) and the presence of an output schema, provides a fairly complete picture. It lacks explicit usage context (e.g., when playback is paused) but is adequate for the tool's low complexity.

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?

The input schema provides device_id as an optional string/null parameter with no description, so schema coverage is 0%. The description partially compensates by implying that the device_id selects the target device and that omitting it uses the active device, but it does not explicitly explain the parameter's semantics or null behavior.

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 resumes Spotify playback on a selected or active device, using the specific verb 'resume' and resource 'Spotify playback'. However, it does not explicitly distinguish itself from the sibling tool 'spotify_play', which could also be used to start playback, so it lacks explicit sibling differentiation.

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 verb 'resume' implies this tool should be used when playback is paused or interrupted, and the mention of 'selected or active device' gives context about device targeting. However, there is no explicit guidance on when to use this versus alternatives like 'spotify_play' or 'spotify_pause', nor any mention of prerequisites or error conditions.

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