get_latest_version

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

Since no annotations are provided, the description must carry the full burden of behavioral disclosure. It does disclose what is returned ('Returns package name, latest version, description, and timestamp'), which is useful. However, it does not explicitly state that this is a read-only operation, mention failure modes, or address prerequisites, leaving gaps in transparency.

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?

The description is two well-structured sentences. The first sentence states the core purpose, and the second sentence gives both usage guidance and return information. Every word earns its place, with no fluff or redundancy.

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?

The tool is low-complexity (2 parameters, no output schema), and the description covers the essential aspects: what it does, when to use it, and what it returns. It could be more complete by explicitly noting that it handles only a single package (vs. a batch tool) or by describing registry-specific behavior, but these are minor gaps given the simplicity.

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?

The input schema has 100% description coverage for both parameters, so the baseline is 3. The description does not add any parameter-specific semantics beyond what the schema already provides, such as the enum choices for registry or the meaning of package_name. It adds no extra value here.

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's action and resource: 'Get the latest version of a package.' This is a specific verb+resource pair that is easily distinguished from siblings like check_version_exists or get_package_info. The added mention of return values further clarifies its scope.

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 provides explicit usage context: 'Use for dependency updates, version checks, or when you need the most recent stable release.' However, it does not name alternatives or exclusions (e.g., when to use get_latest_versions instead), so it lacks the explicit when-not guidance of a 5.

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