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

No annotations are supplied, so the description carries the disclosure burden; it states that gateway credentials are used and that charges and authorization come from the gateway, adding auth/cost context. It also sets an attribution obligation for reused excerpts and indicates the output includes a page key. It does not cover rate limits, pagination, or explicit read-only status, leaving some behavioral gaps.

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 description front-loads the core purpose in one sentence and follows with usage, attribution, and gateway details. Each sentence is relevant, though the gateway authorization sentence is somewhat generic and could be tighter. No filler.

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?

For a two-parameter read-only search tool with no output schema and no annotations, the description covers purpose, follow-on retrieval, attribution, and gateway cost/auth context. It leaves result-set shape and pagination implicit, but the schema documents the limit bound. Adequate overall.

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%, with both q and limit documented in the input schema. The description adds the destination/travel-guide query intent but no syntax, defaults, or limit semantics beyond the schema. Baseline 3 applies because the schema already handles parameter documentation.

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 opens with a specific verb and resource: 'Search English Wikivoyage for destinations and travel guides.' The word 'English' separates it from wikivoyage_get_zh_search, and the second sentence routes the agent to guide retrieval via the returned page key, distinguishing it from wikivoyage_get_guide_title. An agent can select it without opening the 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?

It gives a clear workflow — search first, then use the returned page key to retrieve a guide — which implicitly selects this tool over the guide-fetch sibling for discovery. It does not name an explicit alternative or state when not to use it, so it falls short of full when/when-not guidance.

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