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

The annotations already declare the operation as read-only, idempotent, non-destructive, and not open-world, so the safety profile is covered. The description adds useful context by listing the kinds of data returned, but it does not explain default behavior when city is omitted or how the results are structured.

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 is a single efficient sentence that front-loads the main purpose and follows with the optional parameter. It contains no redundant or filler text.

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 simple read-only list tool with one optional enum and no output schema, the description covers the broad return categories and optional city. It still leaves gaps around default behavior, result structure, and sibling differentiation.

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?

The single city parameter has an enum but 0% schema description coverage. The description says it is optional and must be a supported city, but it does not explain whether choosing a city filters sections, changes the returned guides, or what happens when it is omitted.

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 uses a specific verb, 'List', and names the resources returned: city sections, Germany-wide guides, and supported language codes. It is clear enough to distinguish this from get_guide, but it does not explicitly differentiate it from list_cities.

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 optional city parameter implies that the tool can be used either for all sections or for a specific city. However, the description does not state when to use this tool instead of list_cities or get_guide, leaving the choice implicit.

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