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

Annotations already declare readOnlyHint and openWorldHint, so safety is covered. The description adds real context beyond that: results are 'current' (freshness), returned as 'article cards' (shape), and the parameter must originate from ghanaweb_sections (a prerequisite link). It stops short of pagination/rate-limit detail, but the output schema carries return structure.

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, zero filler, and the core purpose is front-loaded before the disambiguation clause. Every word 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 annotations covering the safety profile, a fully documented single parameter, and an output schema for return shape, nothing an agent needs to invoke this correctly is missing. The sibling routing completes the picture.

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 single 'section' param already lists all documented slug values. The description only reinforces that the slug comes from ghanaweb_sections, adding a relationship hint rather than new syntax, so the baseline 3 applies.

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) plus the resource (GhanaWeb article cards) and the exact scope (one section slug from ghanaweb_sections). It also names the two nearest siblings it is not, so an agent can distinguish it from ghanaweb_news and ghanaweb_article without opening a 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?

Explicitly routes the agent: ghanaweb_news for the general feed, ghanaweb_article for one story's body. This is a genuine when-to-use/which-alternative clause, not an implied one, and the section-provider tool is named as the source of the argument.

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