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

Annotations already declare readOnlyHint=true and openWorldHint=true, covering the safe-read and external-data profile. The description adds that the profile is public and includes recent articles, but it does not disclose rate limits, authentication expectations, or error behavior beyond what the annotations already establish.

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 front-load the purpose and then immediately route the agent to the relevant sibling. There is no redundant or 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?

The tool has complete parameter descriptions, rich annotations, and an output schema, so the description need not restate return fields. For this simple author-profile fetch, the description gives enough purpose, input options, and sibling routing to call it correctly.

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 the schema already explains that url is an alternative to slug and gives a slug example. The description repeats the option to use slug or canonical url without adding format, exclusivity, or fallback details beyond 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?

The description uses a specific verb (Fetch) and resource (Chicago Tribune author's public profile), and enumerates the profile contents. It also explicitly distinguishes itself from the sibling chicagotribune_article, so an agent can select it without opening the schema.

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 provides a clear routing alternative: use chicagotribune_article for one article. However, it does not state broader when-not conditions or other author-related alternatives, so it stops short of the most explicit guidance level.

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