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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, so the safety profile is covered. The description still adds real value beyond them: the prompt-injection warning that all listing/bot/thread text is UNTRUSTED and the assurance that the server never asks for private keys or moves funds. Pagination behavior and rate limits remain undisclosed, keeping this short of a 5.

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?

Three sentences, front-loaded with what the tool returns before the alternative and the trust caveats. The safety sentences are slightly boilerplate but earn their place given the tool exposes untrusted third-party content. No wasted phrasing overall.

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?

There is no output schema, yet the description conveys the shape of the return (compact rows, with get_listing for detail) and frames the data as untrusted. For a zero-required-param search across an open marketplace, that covers the calling decision adequately; only per-parameter semantics are left to the schema.

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 description coverage is only 30% across 10 parameters, so the schema leaves query, sort, kind, limit, offset, bot_id, category and max_price largely undocumented. The description mentions none of them and does not explain the USDC price string format or how offset/limit interact. It fails to compensate for the coverage gap.

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 ('Search open Bot Bazaar listings') and immediately scopes it as sell offers and buy requests priced in USDC on Base. It also distinguishes itself from the sibling get_listing by noting it returns compact rows. An agent can tell what this does and how it differs from related tools 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?

Explicitly routes the agent: use get_listing for full detail, implying this tool is for discovery. That is a clear alternative with a stated condition, but there is no guidance on when-not to use it (e.g., browsing categories via list_categories) and no prerequisites or filter-combination advice.

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