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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=true, so the safety and openness profile is covered. The description adds nothing beyond that — no note on result freshness, pagination limits, rate limits, or the fact that all filters are optional and defaults apply. It largely restates what the schema and annotations already convey.

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 tight sentence that front-loads the verb and resource with no filler or repetition. It is efficient, though the sentence is arguably too thin for an 8-parameter search tool rather than overly long.

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?

Eight parameters, all optional with defaults, and no output schema. The description does not explain what happens when no query is supplied, how the default min_discount=1 and limit=5 shape results, or how paging behaves. For a tool with zero required parameters, this leaves the agent guessing at the default search behavior.

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 100%, so every one of the 8 parameters is already documented (query, store, country, category, max_price, min_discount, page, limit). The description's phrase 'using keywords and filters' adds no syntax, format, or interaction detail (e.g. how query interacts with category or store) beyond the schema, so the baseline 3 applies.

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 (real product deals) plus the scope (across DiscountHub merchants) and the mechanism (keywords and filters). It is clear what the tool does, but it draws no boundary against siblings like get_best_deals, compare_deals, or get_store_offers, so an agent cannot tell from the description alone which of these to pick.

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 and no mention of alternatives. The seven siblings overlap heavily with a keyword-plus-filter deal search, and nothing in the description says when this tool is preferred over get_best_deals, compare_deals, or find_promo_codes. Usage is only implied by the word 'Search'.

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