addToQueue

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

No annotations are provided, so the description bears full responsibility for behavioral disclosure. It states the action ('adds') but does not clarify whether items are appended to the queue, whether an active device is required, what occurs if the item is unavailable, or any side effects. This lack of detail is a significant gap for a mutation tool.

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 that front-loads the verb and resource. Every word contributes meaning; there is zero waste or repetition.

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 simplicity, the description is adequate for basic understanding. However, with no output schema or annotations, it lacks important operational context such as prerequisites (active device), whether the operation replaces or appends to the queue, and error behavior. This leaves room for ambiguity in real-world usage.

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 schema provides complete descriptions for all four parameters (100% coverage), so the baseline is 3. The description adds no extra semantics beyond referencing the item types, which aligns with the 'type' enum. It does not clarify the relationship between id, uri, and type, but the schema already handles that adequately.

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 uses a specific verb 'Adds' and identifies the exact resource 'playback queue', while also enumerating the accepted item types (track, album, artist, playlist). This clearly distinguishes it from sibling tools like addTracksToPlaylist (which targets a playlist) and playMusic (which initiates 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 description implies the use case: when you want to place an item into the playback queue rather than playing it immediately or adding to a playlist. However, it does not explicitly state when to prefer this tool over siblings like playMusic or addTracksToPlaylist, nor does it mention any prerequisites such as an active device.

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