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

Annotations already cover read-only, idempotent, non-destructive traits. Description adds behavioral context by explaining how the tool behaves differently with or without a version, and clarifies the meaning of Developer Trust Score. This goes beyond annotation coverage.

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 reasonably concise with three main sentences plus a clarifying note on dependency terminology. It is front-loaded with the core purpose, though the last two sentences about direct/transitive dependencies add some extra detail.

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 single-parameter read-only tool with no output schema, the description adequately explains what it returns, when to use it, and the ranking concept. It could specify the return format more explicitly, but the high-level output description is sufficient for an agent to invoke it correctly.

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 already explains PURL, Maven namespace, version optionality, and the 20-item limit. The tool-level description adds usage context (new vs upgrade) but not additional parameter-specific details beyond what the schema provides.

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 it 'Returns top dependency version recommendations ranked by Developer Trust Score with security, licensing, and quality analysis,' which is a specific verb+resource. It clearly distinguishes itself from siblings by focusing on recommendations rather than a single version lookup.

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?

Explicitly says 'Use this when selecting a new component to add to a project (without version) or when upgrading an existing component (with version),' giving clear context. It does not explicitly name alternatives or exclusion cases, but the use cases are well-defined.

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