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

Annotations already declare readOnlyHint, idempotentHint, and non-destructive behavior, so safety is covered. The description adds useful content scope (what the walkthrough covers, including the no-signup sandbox path), but says nothing about response format, size, or whether all sections are returned by default.

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 sentence that front-loads the action, identity of the content, and its audience (agents), with zero filler or restatement of the title.

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 no-required-parameter, read-only docs retrieval with no output schema, the description covers what the caller will get well enough to invoke correctly. It could be stronger by noting the default behavior when section is omitted (full guide vs. index).

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% and the enum values are fully documented, so the schema does the heavy lifting. The description's enumerated topics loosely map to the enum (errors, revocation) but adds no syntax, default, or behavior detail for the optional section parameter, so the baseline 3 applies.

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 and resource (return the authentication walkthrough for agents) and enumerates the exact topics covered: sandbox key issuance, scoped access delegation, error handling, revocation. This clearly differentiates it from generic siblings like docs_read_page or docs_search, which would require the agent to know the page first.

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 rather than stated: the agent must infer it should call this before attempting authentication rather than searching docs. No explicit when-to-use, prerequisites, or named alternative (e.g. docs_search for non-auth topics) is provided.

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