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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds that this returns richer per-listing data than the search siblings, which is useful behavioral framing, but it discloses nothing about auth, rate limits, or notable side effects.

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 payload scope before the id-provenance note. No filler; every clause adds information.

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?

With an output schema handling return values and annotations covering safety, the only remaining gaps an agent needs are the payload distinction and the id source, both of which the description supplies. Complete for a single-parameter detail tool.

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 0%, so the description must carry the parameter burden and does: it explains that id is the listing's numeric id and exactly where to obtain it (a search or sold-listings result's listings[].id field). This is meaningful provenance beyond the bare 'integer' type in the schema.

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+resource ('Full normalized listing-detail data for one Grailed listing') and enumerates the payload (description, every photo, measurements, designers, seller profile). It explicitly distinguishes itself from grailed_search and grailed_sold_listings, which return a flattened summary, so an agent can route correctly without opening a 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?

It names the alternatives (grailed_search/grailed_sold_listings) and frames the trade-off as summary vs. full detail, and tells the agent where to source the id. It stops short of an explicit 'use this when you need X' statement or a when-not-to-use exclusion, but the context for selection is clear.

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