playlists_focus

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

With no annotations provided, the description carries full burden but offers minimal behavioral insight. It states the tool doesn't trigger playback, but doesn't disclose what 'focus' actually does (e.g., selects for future operations, highlights in UI, changes active state), potential side effects, permission requirements, or error conditions. For a mutation-like 'focus' operation with zero annotation coverage, this is inadequate.

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, efficient sentence that front-loads the core action ('Focus a specific playlist') and adds a crucial behavioral constraint ('without triggering it'). Every word earns its place with zero waste or redundancy.

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 apparent mutation nature (focusing implies state change), lack of annotations, no output schema, and many similar sibling tools, the description is incomplete. It doesn't explain what 'focus' means, how it differs from other focus tools, what happens after focusing, or what the agent should expect as a result. The single-sentence description is insufficient for this context.

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 has 100% description coverage for its single parameter (playlistId), so the baseline is 3. The description adds value by contextualizing the parameter's purpose ('to focus'), which aligns with but slightly enriches the schema's 'The ID of the playlist to focus'. This earns a point above baseline.

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 states the tool 'focus[es] a specific playlist' which provides a clear verb and resource, but it's vague about what 'focus' means operationally. It distinguishes from 'trigger' tools by stating 'without triggering it', but doesn't clarify how this differs from other focus tools like 'playlists_focus_active_presentation' or 'audio_focus_playlist'.

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 provides minimal guidance by contrasting with 'trigger' operations ('without triggering it'), but offers no explicit when-to-use context, prerequisites, or alternatives among the many sibling focus tools. It doesn't help an agent choose between this and other focus tools like 'playlists_focus_active_announcement' or 'audio_focus_playlist'.

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