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

Annotations already establish readOnly, non-destructive, and closed-world, so the safety bar is low. The description goes further by describing what comes back (full section plus sibling section ids and headings) and imposes a citation obligation ('Cite the returned url'), which is real behavioral guidance not present in structured fields.

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, front-loaded with the primary action, followed by the secondary return content and the citation rule. No filler or restated 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?

A one-parameter read tool with an output schema, full schema coverage, and complete annotations. The description covers input provenance, primary and secondary return content, and the citation requirement — nothing an agent needs to invoke it correctly is missing.

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 100% and the schema's own id description already gives the 'returned by search_guides' provenance and an example format, so the description's mention of the id source is largely redundant. Baseline 3 applies since 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?

States a specific verb and resource ('Read one section of a BeautySpark guide in full') and pins the input's provenance to search_guides, which separates it cleanly from the search_guides sibling. It also discloses a secondary effect (listing other sections' ids and headings) up front.

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 'by an id from search_guides' establishes the intended workflow: search first, then read. There are no explicit when-not-to-use cases or edge-case guidance, but for a single-purpose read tool the context is unambiguous.

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