chromewebstore_permissions

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

No annotations are provided, so the description bears the full burden. It describes what is returned but does not mention authorization needs, rate limits, or that it is a read-only operation. The lack of behavioral context is a minor gap, but the description is honest and not misleading.

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 sentences efficiently convey purpose, returned fields, use case, and defaults. No redundant information; every sentence earns its place.

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?

Given no output schema, the description lists returned fields comprehensively. It covers the essential context for a permissions retrieval tool. Minor omission: no example output or structure, but the list of fields is sufficient for the tool's narrow scope.

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 baseline is 3. The description adds value by noting defaults for country and lang (country=us, lang=en) and specifying that id is a 32-character extension id, which aids proper usage beyond the schema.

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?

The description clearly states the tool retrieves declared permissions for a Chrome Web Store item and lists the specific fields returned. It distinguishes from siblings like chromewebstore_item (general info) and chromewebstore_privacy (privacy data) by focusing on permissions exclusively.

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 description explicitly states the use case 'security and supply-chain review,' which guides when to use it. It does not explicitly exclude alternatives, but the narrow focus and specificity imply appropriate contexts. Sibling differentiation is implicit through the tool's purpose.

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