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

Annotations already declare readOnly, non-destructive, closed-world, so the safety profile is covered. The description adds genuinely useful behavior beyond that: the exact fields returned (name, handle, price in SEK, stock, URL) and the empty-query fallback. It omits result limits or pagination behavior, which keeps it from 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?

Two tight sentences: purpose and domain first, then return shape, then the empty-query edge case. No filler and the most decision-relevant facts are front-loaded.

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 one optional param and no output schema, the description does the right work by enumerating returned fields and the empty-query case. It is nearly complete; only result-set size/pagination behavior is unaddressed.

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 100%, so the parameter is already documented as free-text over name/description. The description adds meaning the schema does not: that omitting the query returns the full catalog, which is real semantic value for the one optional parameter.

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) and resource (Helsama's product catalog) with concrete domain scope (hemp seeds, CBD powder, skincare). An agent can tell it's a catalog search, though it does not explicitly distinguish itself from the sibling get_product for single-item lookups.

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?

'Empty query lists everything' gives one concrete usage rule for the browse-all case. However, there is no guidance on when to use this versus get_product or the article/fact siblings, leaving the agent to infer routing.

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