get_packages_info

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

With no annotations, the description carries the burden and discloses key behaviors: 'Processes up to 100 packages in parallel' and 'error isolation - failed packages don't break the batch.' This adds significant operational context, though it omits authentication or return format details.

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?

Three sentences, each earning its place: purpose, usage guidance, and operational limits. No fluff or redundancy, and the first sentence immediately states the tool's core function.

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 mentions 'Returns detailed info for each package' and error isolation, but does not specify the return structure. For a batch tool of this simplicity, this is adequate; additional detail on output format or authentication would make it near-complete.

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% for both parameters (packages array, registry enum). The description adds the parallel batch limit of 100 for the packages parameter, but beyond that it does not significantly enhance parameter semantics 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?

Description states 'Get comprehensive package details for multiple packages' with a specific verb and resource, and the explicit 'multiple packages' distinguishes it from the sibling get_package_info tool. It also lists concrete use cases (dependency audits, security reviews, bulk package analysis), making the purpose unmistakable.

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?

It explicitly says 'Use for dependency audits, security reviews, or bulk package analysis,' giving clear context. It does not explicitly name alternatives or when not to use, but the plural scope and sibling names imply that singular requests belong to get_package_info.

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