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

Annotations already declare readOnlyHint=true and openWorldHint=true, so safety and reach are covered. The description adds that only public articles are fetched and that the body is returned as 'readable paragraphs', which is useful, but it adds no auth, rate-limit, or failure-mode detail.

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 discovery alternative second. Every clause carries information; nothing is redundant padding.

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 one fully documented parameter, an output schema carrying the return shape, and annotations covering safety, the description supplies what an agent needs to call it correctly. It could still be richer about failure cases for malformed URLs, but for this complexity level it is essentially complete.

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 url parameter is already documented as the canonical numeric-story-ID URL. The description restates the same constraint ('canonical HTTPS URL ending in a numeric story ID') without adding format examples or syntax beyond the schema, 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) and resource (one public GhanaWeb article) plus the exact payload (metadata and readable body paragraphs). It also names the sibling tools used for discovery, so an agent can distinguish it from ghanaweb_headlines/ghanaweb_news 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 to ghanaweb_headlines or ghanaweb_news to discover articles before calling this one, which is clear context for a detail-fetch tool. It does not state any explicit when-not condition or prerequisite beyond that, so it falls short of a 5.

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