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

Annotations already declare readOnlyHint, openWorldHint, and destructiveHint=false, so the safety profile is covered. The description adds value beyond that by disclosing the authentication requirement (free namemy.app API key with a URL) and the fact that queries hit external sources, consistent with openWorldHint.

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 tightly written sentences with the core capability front-loaded; the API key note is bracketed as secondary detail. No filler text.

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 two-parameter check tool with no output schema, the description covers what is searched and the auth prerequisite. It does not indicate the shape of the result (e.g., boolean vs. conflict report with matches), which an agent would need to know to interpret the response, but otherwise it is sufficient.

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% with two well-documented parameters, so the schema carries the semantics. The description adds no format, syntax, or example detail for 'name' or 'context' beyond what is already in the schema.

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?

Names a specific verb (check) and resource (brand name) and enumerates the exact data sources consulted: USPTO trademarks, live company homepages, and search results. This clearly separates it from siblings like check_domain or generate_names, though no sibling is named explicitly.

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?

States pricing ('Free for all tiers') and the prerequisite of a free API key, which is useful context, but gives no explicit guidance on when to choose this over check_domain or list_domains, nor any when-not conditions. Usage is implied by the tool name rather than spelled out.

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