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

No annotations are provided, so the description carries the full burden of behavioral disclosure, and it discloses nothing. It does not say whether the tool is read-only, whether it mutates project configuration, what permissions or prerequisites apply, or what the output looks like.

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?

It is short, but the brevity comes from omission rather than editing: the only content is the name and a platform alias list. Not a single sentence earns its place by telling the agent anything actionable.

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?

With no annotations, no output schema, two parameters, and a non-obvious domain (UI ownership modes and focus areas), the definition is far too thin. An agent has no basis to know when this guide applies or how to interpret its inputs.

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 50%: 'mode' carries a one-line description while 'focus' is only an enum with no explanation of any value. The description adds zero parameter meaning, not even clarifying the relationship between mode and focus or what 'native-bridge' versus 'headless-shell' implies.

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' is a namespace-qualified restatement of the tool name plus an alias list; it never states a verb or what the guide actually produces. A reader can infer it relates to UI overrides for Apple platforms, but that is inference from the name, not from stated purpose. No differentiation from siblings such as swift::ui.mode.recommend is offered.

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 when-to-use guidance, no when-not-to-use, and no named alternative. The closest sibling, swift::ui.mode.recommend, is left entirely unaddressed, so an agent cannot tell which of the two to call for a given UI question.

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