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

The annotations already declare this as a read-only, idempotent, non-destructive, closed-world operation. The description adds useful behavioral context by explaining that omitting the topic returns the main guides rather than an error or empty result. It does not describe return format or pagination, but that is less critical for a simple read-only search 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 description is two sentences, front-loaded with the main action and followed immediately by the no-topic fallback. Every clause adds useful guidance, with no redundant or filler wording.

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 single-parameter, read-only search tool with rich annotations and no output schema, the description covers the essential behavior and fallback. It could mention expected result format or guide language more explicitly, but nothing critical is missing for correct invocation.

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 input schema has 100% description coverage for the single optional parameter, so the baseline is already solid. The description adds meaning by listing many example topic domains (price, registration, duration, score 785, schools, CPF, Reading tips, vocabulary) that clarify the breadth of acceptable queries.

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 specific verb and resource: it searches Fluentoo guides on a given topic. It also distinguishes the fallback behavior of listing the main guides when no topic is provided. Sibling tools cover format, score, and free tests, so this guide-search tool is clearly differentiated.

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 description gives clear usage context: provide a topic to search guides, or omit the topic to list main guides. It does not explicitly name alternatives or exclusions, but the sibling tools serve different purposes and are unlikely to be confused with guide search.

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