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

Annotations already declare destructiveHint=true and readOnlyHint=false, so the safety profile is covered; the description earns credit for specifying what is destroyed (the custom styling) and the resulting state (default appearance). It does not say whether the reset is reversible or whether prior CSS can be recovered, which would be the remaining high-value detail for a destructive operation.

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?

Two sentences, both earning their place: the first states the action and its scope, the second states the observable outcome. The destructive scope is front-loaded in the opening verb.

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 single optional parameter with full schema coverage and no output schema, the description covers action, scope, and outcome adequately. Minor gaps remain around reversibility and behavior on invalid concern names, which matter for a destructive tool.

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 coverage is 100% and the schema already lists the valid concern values plus the omit-means-all behavior. The description's 'all concerns at once' merely restates that rule without adding syntax, ordering, or partial-failure semantics, so baseline 3 applies.

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 gives a specific verb+resource ('Reset/remove custom CSS') and scopes it ('for specific concerns, or all concerns at once'), which reads clearly against siblings like get_custom_css and submit_custom_css. It stops short of naming those siblings or explicitly contrasting itself with them, so it lands at clear-but-not-differentiating.

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 implies the use case (revert to default appearance) and documents the key usage mode of the single parameter ('or all concerns at once'), matching the schema's omit-to-reset-all rule. There is no explicit when-to-use/when-not guidance, no suggestion to inspect current CSS with get_custom_css first, and no warning about proceeding.

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