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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint and destructiveHint=false, so the safety profile is fully covered. The description adds the shape of the result set but says nothing about ranking, ordering, empty results, or rate limits; the 20/50 limit cap lives only in the schema.

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 compact sentences, front-loaded with the search action and result fields; nothing is redundant. The 'PLG/adoption signal' clause is slightly jargon-laden but still earns its place by framing intent.

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 no output schema, the description correctly compensates by enumerating returned fields, and the annotations carry the safety profile. For a two-parameter read-only search this is close to complete, though ordering/ranking behavior is left unstated.

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% — both 'query' (with examples) and 'limit' (default 20, max 50) are fully documented in the schema. The description adds no syntax, quoting, or matching-behavior detail beyond that, so the baseline of 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 and resource ('free-text search of the Chrome Web Store') and enumerates the returned fields (id, name, rating, rating count, user count, category, website), which is more than the title offers. It implies differentiation from chrome_web_store_by_publisher and chrome_web_store_extension via 'free-text search', but never names them.

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 second sentence ('PLG/adoption signal — what tools people are actually installing') hints at the use case, so usage is implied rather than stated. There is no explicit when-to-use, when-not-to-use, or pointer to the sibling publisher/extension lookup tools.

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