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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so safety is covered. The description adds the recency-ordering behavior ('most recent'), which is useful context beyond the annotations, but says nothing about result volume, ordering guarantees, or pagination.

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?

A single front-loaded sentence that names the resource, the scope, and the optional filter with zero filler. Appropriately sized for a two-parameter read tool.

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 annotations covering the safety profile and a complete schema, the core call information is present, and no output schema exists so return values needn't be explained. However, nothing tells the agent the ordering guarantee or what happens when category is omitted, leaving minor gaps for a feed-style tool.

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%, so both parameters (limit with default/max, category enum) are fully documented in the schema. The description only restates that category filtering is optional, adding no syntax or semantics beyond the structured field.

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+resource ('Get Glitchwire's most recent articles') with a scope qualifier ('most recent') and an optional filter. It is clearly distinguishable from search_news and get_article by the recency/feed semantics, though it never names those siblings to reinforce the distinction.

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 description implies context ('most recent articles... optionally filtered by category') but gives no explicit when-to-use guidance, no exclusions, and no pointer to search_news or get_article as alternatives for different needs. An agent must infer the routing decision itself.

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