Apple Ensure Digest Folder

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

The description says 'Ensure ... exists, creating it when necessary,' which implies an idempotent operation, but the annotations declare idempotentHint: false. That is a direct contradiction. The description also reveals a preference-write side effect, but the idempotency conflict forces a low score.

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 with no filler. It states the guarantee, the conditional creation, and the preference persistence efficiently.

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?

While an output schema exists and complexity is low, the description leaves important invocation details unresolved because the schema has zero descriptions. An agent cannot confidently know how to specify the account or folder name or whether the tool operates on a default account. It is not complete enough for correct invocation.

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%, yet the description adds nothing about folder_name or account_name. The defaults in the schema help, but the description fails to compensate for the low coverage; in particular, account_name=null is left ambiguous (default account? all accounts? current account?).

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 names a specific resource and action: ensure a dedicated Notes folder for daily and weekly digests exists, creating it if needed. It also adds the key side effect of persisting the preference, which separates it from siblings like notes_create_folder or apple_set_digest_folder.

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 clearly situates the tool: it is meant for setting up the folder behind daily and weekly digests. It doesn't explicitly name alternatives or exclusions, but the intended context is clear enough for an agent to select it over generic folder-creation tools.

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