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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so the safety profile is fully covered structurally. The description adds no behavior beyond that — no auth requirements, error/not-found behavior, or performance notes — but it also does not contradict anything. It provides only the content scope, which is adequate given the annotation coverage.

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 front-loaded sentence with no filler or preamble. It is slightly long because it enumerates return fields that the output schema already defines, but every clause is on-topic and readable.

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?

Since an output schema exists, the description does not need to enumerate return values — yet nearly all of it does exactly that, making it somewhat redundant. What is actually missing is usage context relative to list_products and check_availability. It is adequate for a simple single-record lookup but not complete.

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?

With one parameter at 100% schema description coverage, the schema fully documents productId, including its format pattern and the note that it comes from list_products. The description adds no syntax, origin, or constraint detail beyond the schema, so the baseline of 3 is correct.

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 title and description make clear this returns the full detail record for a single product, enumerating the specific content areas (description, amenities, rules, rate table, photos). It is distinguishable from list_products by its singular scope. It stops short of explicitly stating the verb-with-ID relationship or naming the sibling it complements, so it is clear rather than differentiating.

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?

There is no when-to-use guidance: nothing says to call this after list_products to drill into a chosen product, nor when get_trip_summary or check_availability would be preferred instead. The 'product id from list_products' hint lives in the schema, not the description, so the description itself offers no routing context.

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