love_track

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

Annotations already convey that the operation is not read-only, is idempotent, and is not destructive. The description adds the useful requirement that authentication is needed, but it does not disclose side effects on the user's loved-tracks collection or clarify that the action can be reversed with unlove_track.

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 short and front-loaded with the core action in the first sentence. The Args section is terse despite being partially redundant with the input schema, and the authentication note is a worthwhile addition.

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 two-parameter mutation with annotations already covering idempotence and destructiveness, the description is mostly complete: it states the action and the key prerequisite of authentication. It could be more complete by mentioning the current authenticated user's library is modified, but that is reasonably implied.

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 0%, so the description must clarify the parameters. It adds the minimal useful detail that artist is 'Artist name' and track is 'Track name,' helping distinguish names from IDs. However, it does not explain matching behavior, formatting requirements, or how these values relate to the authenticated user.

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 a specific verb ('Mark') and resource ('a track') with the result ('as loved'), making the intent immediately clear. It also naturally distinguishes this tool from the sibling unlove_track and read-only tracking tools like get_user_loved_tracks, even though those alternatives are not explicitly named.

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 only guidance is 'Needs authentication,' which is a prerequisite rather than a usage rule. There is no mention of when to choose this over alternatives such as unlove_track or add_track_tags, nor any exclusion criteria or pairing guidance.

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