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

Annotations already declare readOnlyHint=true, openWorldHint=false, and destructiveHint=false, so the safety profile is covered. The description adds useful non-annotation context: the response is cleaned/ad-free markdown containing title, date, author, source URL, and full body, which is valuable given there is no output schema.

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 with zero filler; the core purpose and return contents come first and the slug-source instruction follows. Every clause earns its place.

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?

With a single fully-documented required parameter, no output schema, and annotations covering the safety profile, the only remaining burden is describing what is returned — which the description does explicitly. An agent has everything needed 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 slug pattern/example is fully documented in the schema, so the baseline is 3. The description only adds the provenance of the slug (from search_news/latest_news), which is workflow guidance rather than new parameter semantics.

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 (fetch) and resource (one Glitchwire article) plus the return format (clean, ad-free markdown) and the fields it contains. It distinguishes itself from sibling tools by pointing to search_news/latest_news as the source of the slug rather than duplicating their discovery role.

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?

Explicitly directs the agent to take the slug from search_news / latest_news results, which is clear context on the intended workflow. It stops short of stating when not to use this tool (e.g. don't call it with a free-text query), but the dependency chain is unambiguous.

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