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

With no annotations and no output schema, the description carries the full burden, and it does disclose the return content (SKUs, USD prices, how each can be bought), which adds real value. However, it says nothing about pagination/limit behavior, result ordering, or auth requirements for a 7-param search.

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 tight sentences, front-loaded with scope and followed by return content. No redundant restatement of the title or name, and nothing that could be cut.

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 7-param tool with no annotations and no output schema, the description adequately covers what is searched and what is returned, but leaves most parameters and all runtime behavior (limits, ordering, auth) unaddressed. Minimally sufficient rather than 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?

Schema description coverage is only 14% (just 'orderable'), so the description must compensate. It partially does by phrasing the kind categories ('store plans', 'Web3 domains', 'partner products') and noting USD prices, but q, sort, limit, min_price and max_price are left entirely unexplained.

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 (search) plus the exact resource categories it covers (merch, store plans, Web3 domains, partner products, servers for sale). This cleanly separates it from siblings like get_item (single lookup) and search_site. It also names what comes back (SKUs, USD prices, purchase routes).

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 implied by the purpose – you'd call this to find purchasable items – but there is no explicit when-to-use, no when-not, and no reference to alternatives such as search_site or get_item. The 'for sale' framing is the only contextual signal.

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