watch_artists

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

With no annotations, the description carries the full behavioral burden. It does disclose that this writes to a 'local watchlist sidecar' rather than altering Spotify state, which is useful. However, it does not mention idempotency, duplicate handling, persistence, or what happens if the sidecar does not yet exist.

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 dense sentence with no filler. It front-loads the action and resource, then states the purpose. Every word earns its place.

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?

The description and schema together are sufficient for a basic understanding, but there is no output schema and no annotation to clarify return behavior or side effects. The description does not explain what the tool returns, how the watchlist is stored, or how this watchlist is later consumed by polling workflows.

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 100%, so the schema already documents all three parameters. The tool description adds no parameter-specific meaning beyond what is already present in the schema, making the baseline score of 3 appropriate.

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 ('Add'), a concrete resource ('local watchlist sidecar'), and the purpose ('new-release polling'). This clearly distinguishes it from read-only artist tools and from sibling tools like check_artist_releases or save_artist_new_releases.

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 purpose 'for new-release polling' implies when this tool is appropriate, but the description never explicitly says when to use it instead of related siblings like save_artist_new_releases, artistwatch_new_additions, or save_release_radar. Context is present, but exclusions and alternatives are left unstated.

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