list_folders

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

No annotations are provided, so the description carries the full behavioral burden. It usefully discloses the return shape (folder names and IDs), which matters because no output schema exists, and 'list' implies a read-only operation. However, it says nothing about authentication requirement for the iCloud account or behavior on empty/absent accounts, leaving some behavioral gaps. Since the definition contradicts no annotations, no penalty applies.

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?

A single, front-loaded sentence that states scope first and the return payload second. Every clause earns its place with no filler.

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 zero-parameter listing tool with no output schema, the description covers the essentials, including the return contents (names and IDs). It could be more complete by noting the read-only nature and the account/permission prerequisite, but nothing critical to invoking it correctly is missing.

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 takes zero parameters, so per the rubric the baseline is 4. There are no parameter semantics to explain, and the schema is fully consistent with a no-argument call.

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 and resource: listing all folders under the Apple Notes iCloud account. It is distinguishable from every sibling (list_articles, save_article, search_articles, get_article), none of which concern folders, though the domain mismatch with the article-oriented siblings is worth noting. It stops just short of 5 because it does not explain the scope boundary (e.g., whether nested/shared folders are included).

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?

Usage is only implied: an agent can infer this is the tool for browsing the folder structure, but the description names no alternatives or conditions for when to use it versus other discovery tools. With no parameters there is little ambiguity, but no explicit when/when-not guidance is given.

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