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

Annotations already declare readOnlyHint=true and openWorldHint=false, so safety is covered. The description adds useful context that the guides are bilingual and carry correct official names and links, but says nothing about list size, pagination, or truncation of the full text, which are the practical traits an agent needs for a content-retrieval tool.

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?

The purpose and the slug/no-slug behavior are front-loaded and useful. The middle of the description is a single run-on sentence listing roughly twenty guide topics, which is heavy for a one-parameter tool and could be condensed, though the enumeration does aid discoverability.

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 an output schema present, return values need not be described, and annotations cover the read-only profile. The description supplies mode behavior and content scope, leaving only minor gaps (pagination, list size) for what is a simple single-parameter lookup.

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 coverage is 100% and the schema already documents the slug with an example. The description goes beyond the schema by explaining the otherwise-undocumented behavior of omitting slug entirely (returns the guide list rather than an error), which is genuine added meaning for an optional parameter.

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 states a concrete resource (bilingual step-by-step guides to Ethiopian government and banking services) and enumerates the covered topics, which clearly separates it from siblings like get_news_article or search_knowledge. It does not explicitly name a sibling to avoid, but the domain scoping is specific enough that an agent can place it.

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?

'Call with no slug to list guides; call with a slug for the full text' clearly documents the two invocation modes, which is real operational guidance. However, it gives no when-to-use context versus alternatives (e.g. search_knowledge for general queries) and no exclusions, so it stays at implied usage rather than explicit routing.

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