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

Annotations already cover the safety profile (readOnly, idempotent, closed-world), so the bar is lower, and the description adds real substance: it enumerates what the check covers (vulnerabilities, active exploitation, EOL) and that a fixing version is returned. It doesn't mention rate limits or coverage gaps in the vulnerability database, which would have pushed it higher.

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?

One sentence, front-loaded with the action, and every clause carries information — the vulnerability/exploitation/EOL scope and the remediation answer. No filler.

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?

An output schema exists, so the return shape needn't be explained, and the description adequately frames the input and scope for a two-parameter read tool. The only shortfall is the absence of explicit sibling routing to check_stack or list_products.

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% and both parameters are documented with examples in the schema itself. The description only reinforces that a single product/version pair is expected, adding nothing about accepted version formats beyond what the schema already shows.

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 — check one product version for vulnerabilities, active exploitation, end of life — plus the remediation outcome. The word 'one' implicitly separates it from a stack-wide check, but the sibling check_stack is never named, so differentiation relies on inference.

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?

Usage is implied by 'one product version', suggesting this is the single-version counterpart to check_stack, and list_products is clearly a discovery tool. However, the description never states when to prefer this over check_stack, nor any prerequisite such as needing a resolved version string.

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