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

Annotations already declare readOnly/idempotent/non-destructive, so the bar is lower, and the description still adds two things the annotations cannot: the lazy-initialization side effect ('defaults are seeded' on first access) and the explicit cost (10 credits, Tier 1). It does not mention auth scope or rate limits, keeping it short of a 5.

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 front-loaded prose sentences carry the payload, with group/endpoint/cost as compact bracketed metadata. Nothing is padded, though the cost line duplicates information an agent may also derive from the cost-estimate sibling.

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?

An output schema exists, so return-value detail is unnecessary; the description still names the config contents. Seeding behavior and cost are covered. The only gap is routing guidance relative to the three whitelabel siblings, which no dimension besides usage covers.

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 100% and both parameters (fields, precision) are fully documented in the schema, so the baseline is 3. The description adds no meaning about compact mode, dotted paths, or precision beyond what the schema already states.

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?

States a specific verb (Read) and resource (the authenticated user's branding overrides) and enumerates the concrete fields returned (logo, palette, font, footer, custom domain). It is clearly distinct from the domain/logo/preview siblings by subject matter, though it never names those alternatives.

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 only contextual sentence is 'On first access, defaults are seeded', which is behavioral, not directional. There is no statement of when to call this versus astroway_whitelabel_preview, astroway_whitelabel_logo, or astroway_whitelabel_domain_verify, and no prerequisites or exclusions.

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