create_email_folder

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 discloses only the target app and that creation happens in a single account; it says nothing about required permissions, what happens if the folder already exists, whether creation is reversible, or what is returned.

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; the verb and target app come first. It is efficiently written, though its brevity is a symptom of under-specification rather than deliberate restraint.

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 mutation tool with no annotations, no output schema, and an input schema that declares no properties at all, the description leaves the agent without the operational details it needs — how the folder is named or targeted, and what happens on failure or duplicate.

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?

With zero declared parameters, the baseline is 4. However, the description's phrase 'in one account' implies an account (and presumably a folder name) must be designated, yet neither the schema nor the description explains how that is supplied — a gap the description does not compensate for.

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 (creates), resource (mailbox folder), and target system (the Mac's Apple Mail), which implicitly separates it from outlook_create_folder and create_reminder_folder. It stops short of explicitly naming a sibling to differentiate against, so it lands at 4 rather than 5.

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?

It says what the tool does but never when to use it versus alternatives such as outlook_create_folder or create_reminder_folder, nor any preconditions (account connected, Mail.app running). Usage is only implied by the platform mention.

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