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

Annotations already declare readOnlyHint and openWorldHint, so the lower bar applies. The description adds a genuine behavioral constraint beyond the annotations: 'only the first page is returned,' which tells the agent the article list is paginated/limited.

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 tight sentences with the capability front-loaded and the input/limitation following. No filler, and each sentence serves a distinct purpose (what it returns; what to supply and the pagination limit).

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 the field enumeration is slightly redundant, but the description still gives an agent enough to call the tool: required input is stated and the first-page-only limitation is surfaced. No auth or error behavior is described, keeping it from a 5.

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 there is one parameter, so the schema already documents 'url' fully. The description restates 'Provide a canonical author profile URL' without adding format, example, or validation detail, which is the expected baseline of 3 when the schema carries the load.

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 ('Get'), resource ('MakeUseOf author's public profile'), and enumerates the returned fields (name, job title, headshot, biography, social links, recent articles). This distinguishes it from the article/headlines/news siblings, but it never explicitly names an alternative tool, so it falls short of a 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?

The only instruction is 'Provide a canonical author profile URL,' which is a parameter requirement, not usage guidance. There is no statement of when to choose this tool over makeuseof_article, makeuseof_news, or the other MakeUseOf siblings.

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