playlists_get_focused

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

No annotations are provided, so the description carries full burden for behavioral disclosure. It only states the core action without revealing what happens when no playlist is focused (e.g., returns null vs. error), whether the operation is read-only, or any side effects. This is insufficient for a tool with zero annotation coverage.

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 (4 words) that efficiently conveys the tool's purpose without any wasted words. It is appropriately sized and front-loaded, meeting the conciseness criteria.

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 has no parameters, no output schema, and no annotations, the description provides the minimum viable information. However, it lacks details about return type or behavior (e.g., what is returned if no focused playlist). For such a simple tool, it is adequate but has clear gaps compared to richer examples.

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 tool has zero parameters and the schema is fully covered (100% coverage). The description does not need to explain parameters, and it correctly implies no inputs are required. Baseline for zero parameters is 4; no additional meaning needed.

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 'Get the currently focused playlist' clearly specifies the action (get) and the resource (currently focused playlist). It distinguishes itself from siblings like playlists_get (requires parameter) and playlists_get_active (different state), making the tool's purpose unambiguous.

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 usage when the focused playlist is needed but provides no explicit guidance on when to use this tool versus alternatives (e.g., playlists_get_active, audio_get_focused_playlist). No exclusion criteria or alternative suggestions are given, leaving the agent to infer context from sibling names.

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