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

Given readOnlyHint=true and openWorldHint=true are already provided, the description adds meaningful context beyond annotations: the endpoint is credential-free (no auth) and the storefront URL is fixed server-side. What each result class contains is also sketched. It stops short of noting rate limits or result-shape details, but output schema covers the latter.

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?

Reasonable size and front-loaded, but the middle sentences duplicate schema text ('q: Required. Search query text. limit: Maximum suggestions to return. Default 10, maximum 20.'), which is redundant rather than additive.

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 3-param, credential-free read tool with an output schema present, the description covers the essentials (auth-free access, fixed endpoint, result types) and needn't explain return values. The unmentioned types parameter is the only minor gap and is handled by 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 100%, so the schema already documents all three parameters. The description only restates q and limit verbatim and omits any mention of the types parameter, adding no meaning beyond the schema. 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+resource: returns products, collections, and query suggestions from a predictive search endpoint. It distinguishes itself from the product-detail sibling by naming ohpolly_product, though it doesn't differentiate from the other suggest/search siblings in the family.

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?

The only routing guidance is 'Use ohpolly_product to get a Oh Polly product,' which gives one alternative but no explicit condition for choosing this tool over the other sibling search/suggest endpoints. Usage as an autocomplete/suggestion tool is implied rather than stated.

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