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

No annotations are provided, so the description carries the full behavioral burden. It implies a read-only lookup but never states that, nor does it disclose response shape, caching, rate limits, or error behavior for nonexistent packages. For a tool with zero annotation coverage this is a notable gap.

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?

A single efficient sentence with no filler. It is front-loaded and wastes nothing, though brevity here borders on under-specification rather than tight scoping.

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 annotations, no output schema, and many domain-specific siblings, the description does not provide enough context for an agent to invoke confidently or predict the return. It should at least enumerate what 'detailed information' includes and how it differs from neighboring tools.

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% and the single 'name' parameter is documented in the schema as 'Package name on hex.pm'. The description adds no parameter detail beyond that, so the baseline 3 for fully-covered schemas 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 clear verb+resource: fetches detailed information for a package. An agent can understand the operation, but the description never distinguishes this tool from siblings like versions, docs, owners, or readme, which all surface package-related data. Without that differentiation the agent cannot tell what 'detailed' uniquely covers.

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?

No when-to-use guidance at all. With siblings such as versions, docs, release, owners, and health available, the description gives no signal about when 'info' is the right choice versus a more specific tool.

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