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

Annotations already declare readOnlyHint, openWorldHint, and destructiveHint=false, so the safety profile is covered. The description adds real value beyond that by specifying the listing is public and by naming the categories of data returned, which tells the agent what to expect without a separate output schema.

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?

One front-loaded sentence with zero filler; the verb and resource come first and the returned-field list follows. Every clause 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?

For a simple one-parameter read tool with no output schema, the description adequately covers what the call returns and that the listing is public. The remaining gap is failure behavior for an invalid or unknown slug, which the annotations do not cover either.

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?

There is a single parameter with 0% schema description coverage; the schema only constrains format (pattern, maxLength) without explaining what a slug is. The description implicitly establishes that the slug identifies a specific public listing, but it never explains the slug format or where the agent should obtain one.

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 ('Read') and resource ('a public Hyatus listing') and enumerates the returned content: capacity, amenities, stay rules, review summary, and listing link. It is clearly distinct in intent from search/price/compare/availability siblings, though it never names them explicitly.

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 only implied: an agent can infer this fetches full detail for one already-known stay, but nothing says when to prefer it over search_hyatus_stays or compare_hyatus_stays. No prerequisites (such as obtaining a slug first) or exclusions are stated.

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