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

With no annotations, the description carries the full burden, and it does meaningful work: it establishes that this is a read-only retrieval surface, discloses the data provenance (official TWOPAGES product pages), and states a non-fabrication policy ('unstated specs are reported as not stated') that tells the agent how to interpret sparse results. It does not describe response size, ordering, or what a missing slug returns.

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, both earning their place: the first front-loads the resource and its scope, the second front-loads the trust/provenance caveat. No 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 two-optional-parameter read tool with no output schema and no annotations, the description covers scope, provenance, and data-quality behavior adequately. The remaining gap is routing guidance relative to the sibling curtain/spec tools, which matters because their names alone do not make the split obvious.

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%, so both q and slug are already documented with examples and the omit-to-list rule. The description's phrase 'the full guide (takeaways, products, FAQ, sources)' duplicates what the slug parameter description already says, and it adds no syntax or matching semantics for q beyond the schema examples.

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?

The description gives a specific verb ('List or read') and a precisely bounded resource (the 5 named Curtain Guides, each enumerated by topic), so an agent knows exactly what it will get. It stops short of distinguishing itself from the closely related sibling get_curtain_window_wellness_specs, so the boundary between the two must be inferred.

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?

'List or read' implies the two operating modes, and the schema supplies the condition (omit slug to list). However, there is no explicit when-to-use guidance against the sibling tools, and no statement of when this tool is the wrong choice versus get_curtain_window_wellness_specs or search_healthstylz_articles.

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