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

With no annotations, the description carries the full burden. It does disclose a genuinely useful security fact the schema cannot convey: merchant identity comes from a cloud token or the platform default, and no API key is needed. However, it says nothing about read-only semantics, rate limits, empty-result behavior, or error conditions.

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 with no filler, and the core capability is front-loaded before the merchant-resolution detail. Efficient and readable, though the parenthetical parameter list reads a bit like a schema restatement.

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 4-parameter tool with 0% schema coverage, no annotations, and no output schema, the description covers the basics but omits the two things an agent most needs: the serialization format of 'filters' and 'pagination', and any sense of the result shape or paging behavior. Adequate to start, not sufficient to call confidently.

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 0%, so the description must compensate. It does map all four parameters conceptually (query = text query, filters = price filters, pagination = pagination, cloud = token source), which is better than nothing. But it gives no encoding hints for the string-typed 'filters' and 'pagination' arguments, so an agent still cannot construct valid values from the description alone.

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?

Specific verb+resource: "Search a merchant catalog" with the sub-mechanisms named (text query, price filters, pagination). It is clear what the tool does, but it never distinguishes itself from the closest siblings, uxc_lookup_products and uxc_get_product, which sound like they also retrieve product data.

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 statement of when to reach for this tool rather than uxc_lookup_products, uxc_get_product, or uxc_get_market. Usage can only be inferred from the word "Search" plus the presence of filters, which is the minimum of implied guidance and leaves the agent guessing among near-identical siblings.

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