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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive, openWorld). The description adds genuinely useful behavior beyond that: results are sorted 'most popular first,' capped at 'up to 5 mock tests' per exam, and each item includes an exam page url plus mock test questions/minutes/url. It doesn't mention pagination behavior despite the page param.

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?

A single dense sentence that front-loads the resource and packs in examples, sorting, limits, and return fields. The 'Free exam preparation on Youth4work Prep' preamble is slightly promotional but short, and no sentence is wasted.

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 no output schema, the description carries the return-value burden and does it reasonably well, disclosing sorting, the 5-test cap, and returned fields. The only meaningful gap is pagination, since the page parameter and its 20-per-page behavior go unmentioned.

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%, so all three parameters (exam, category, page) are already documented in the schema. The description reinforces exam/category semantics with examples but adds no syntax or format detail beyond the schema, and never mentions the page parameter. Baseline 3 is appropriate.

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 (finds/searches) and resource (exams/mock tests) and even enumerates example values, so the agent knows exactly what it returns. The 'search' verb distinguishes it from the sibling get_mock_test by implication, but the description never explicitly names or contrasts that alternative.

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?

Usage is implied through 'by name and/or category,' giving the agent a sense of how to query. However, there is no explicit when-to-use/when-not guidance and no routing to the sibling get_mock_test, which retrieves a single test and is the natural alternative.

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