itunes_get_new_releases

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

Annotations are not provided, so the description must disclose behavioral traits. It implies a read-only operation via 'fetch', but does not explicitly state that it does not modify anything, nor does it mention any side effects, rate limits, or output behavior. This is adequate but not thorough.

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 very concise: a short purpose sentence followed by two parameter explanations. It is front-loaded with the main action and contains no unnecessary words, making it efficient and easy to parse.

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 fetch tool with two parameters and no output schema, the description is mostly complete. It explains both parameters and the purpose. However, it does not describe the output structure or mention that it returns a list of releases, which could be assumed but is not stated. Given the simplicity, it is adequate but not fully comprehensive.

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 0% coverage, but the description adds meaning to both parameters. For 'country', it gives examples like 'gb', 'us', 'ng', 'ca', and for 'limit' it specifies a default and maximum (25 and 100). This goes beyond the schema's basic type and default information.

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 clearly states the tool's purpose: 'Fetch Apple Music's latest official album and single releases by country.' The verb 'fetch' and resource 'latest official album and single releases' are specific and distinguish it from sibling tools like itunes_get_top_charts or itunes_get_artist_albums.

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?

There is no guidance on when to use this tool versus alternatives. It does not mention any exclusions, comparisons to other iTunes tools, or scenarios where this tool is preferred. The description simply states what it does without context on usage.

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