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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so safety is covered. The description adds only 'in reading order for a newcomer' — a useful ordering hint but no info on the shape of the returned categories or error behavior for a bad key.

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 compact sentence plus a short follow-up; front-loaded with what is returned. Slightly elliptical ('Pass a key' — which key?) rather than wasteful.

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 with no output schema, the description should say enough about the returned list (are there many categories? does order matter for the agent's workflow?) and about the 'key' it references. It gives the gist but leaves the return shape and the help_list handoff underspecified.

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?

With 100% schema coverage and an enum plus fallback rule documented in the schema, the baseline is 3. The description only gestures at how the result feeds 'a key to help_list' without explaining the lang parameter's effect on ordering or category names.

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 resource (categories of the help index) and the payload it returns (article counts, reading order for a newcomer). It is distinguishable from siblings like help_list and help_get, though it doesn't explicitly say how it differs from help_list — only that a key should be passed to it.

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?

Implies usage via 'Pass a key to help_list', which tells the agent this tool is an entry point feeding another. But there is no explicit statement of when to call this rather than help_list, help_search, or help_get.

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