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

No annotations are provided, so the description carries the full burden, and it discloses almost nothing: no mention of result format, pagination limits, rate limits, or whether the search is exact vs fuzzy. The only behavioral hint is the schema's page/sort params, which the description itself does not explain.

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 short, front-loaded sentence with zero waste. It is efficient, though arguably underspecified rather than truly concise about behavior.

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 three-parameter tool with full schema coverage and no output schema, the essentials are present via the schema. Still missing is any statement of result scope, pagination defaults, or how it relates to the other search-ish siblings, which matters given a crowded sibling list.

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%, with query, page, and sort all documented inline (including the sort enum values). The description adds no extra meaning beyond that baseline, which is adequate but not enhancing.

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 ('Search hex.pm packages'), so an agent knows this queries the package registry. However, it offers no differentiation from siblings like search_docs or toolbox_search, which could also be described as searches, leaving overlap to be inferred.

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?

There is no when-to-use or when-not-to-use guidance. The description does not say how this differs from search_docs (documentation search) or toolbox_search, so the agent must guess which search surface to pick.

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