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

Annotations already declare this a safe, idempotent, read-only, closed-world operation, so the description only needs to add context. It does add one useful behavioral fact: the result is a snapshot tied to a specific release's docs site, not a live/latest nav. It says nothing about return shape beyond "JSON", tree depth, or size.

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?

Three short, front-loaded fragments with no filler; the core fact (sidebar tree as JSON) comes first and each remaining clause adds new information.

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 one-parameter read tool with no output schema, stating that the return is a JSON sidebar tree is mostly sufficient. The remaining gap is the version-identifier format, which neither the schema nor the description specifies.

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 coverage is 0%, so the description must carry the burden for the single required parameter. "Version-scoped: snapshot of that release's docs site nav" does clarify that forVersion means a release version rather than a branch or slug, but the accepted version string format is never stated.

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?

"Sidebar tree as JSON" names the concrete resource returned, and "Replaces scraping the Docusaurus sidebar" makes the intent unambiguous even without an explicit verb. It is distinctive against siblings like docs_search or design_docs_list, though it never explicitly contrasts itself with them.

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 phrase "Replaces scraping the Docusaurus sidebar" implies the situation to use it in (when you need nav structure rather than search results), and "version-scoped" hints that a version must be chosen. There is no explicit when-to-use/when-not guidance or named alternative such as docs_search.

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