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

Annotations already cover the safety profile (readOnlyHint, destructiveHint=false, openWorldHint). The description adds real context beyond them: newest-first ordering, the fields bundled per question, and an explicit auth requirement ('Needs the user's Cotlet API key with access to this app'). It stops short of noting pagination or result limits.

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 lead sentence ('Udemy: Questions from the course Q&A with lecture, text, replies and whether it is answered') is largely restated by the second sentence ('Lists questions from the course Q&A, newest first, each with its lecture, text and replies'), so a full sentence is spent on redundancy rather than earning its place.

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 read-only listing tool with no output schema, the description conveys what is returned, ordering, the one filter, and the auth requirement. Nothing essential for a correct call is missing, though pagination/limits behavior is unaddressed.

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 every parameter is already documented upstream (unanswered_only in the schema is verbatim the same phrasing used in the description). The description adds no syntax or format detail beyond the schema. Baseline 3 applies when the schema does the heavy lifting.

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 ('Lists questions from the course Q&A') and enumerates exactly what each returned question contains (lecture, text, replies, answered status). This clearly separates it from write siblings like udemy_reply_to_question and from udemy_list_reviews.

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 one concrete usage trigger ('Set unanswered_only to see questions with no instructor reply'), which is useful context. However it never states when to prefer this over other Udemy listing tools or any prerequisites/preconditions beyond the auth note, so usage is only implied.

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