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

Annotations already declare readOnlyHint and openWorldHint, and the description usefully adds that the content is 'public' (no auth required) and that it returns both metadata and body paragraphs. This adds context beyond the annotations, though pagination or content-length limits are not mentioned.

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?

Two sentences, zero waste, front-loaded with the primary purpose followed by the routing guidance. Every sentence earns 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?

An output schema exists, so return values need not be explained, and the description covers purpose, source constraint, and sibling routing. Adequate for a single-param fetch tool, with only minor gaps like pagination behavior.

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?

The single url parameter has 100% schema coverage and the schema already describes it as a 'Canonical Android Authority article URL'. The description reinforces 'canonical URL' but adds no format, syntax, or validation detail beyond the schema, so the baseline of 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 (Fetch) and resource (Android Authority article metadata and body paragraphs) scoped to a canonical URL. It clearly distinguishes itself from the sibling discovery tools it names, so an agent can tell it apart without opening any schema.

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?

Explicitly routes the agent to androidauthority_headlines, androidauthority_news, and androidauthority_sections for discovery, implying this tool is for when you already have a canonical URL. Clear context, though it doesn't spell out an explicit when-not-to-use condition beyond the discovery split.

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