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

Annotations already declare readOnly, idempotent, closed-world, so the safety profile is covered. The description adds real value: it discloses what is reported and, importantly, that embedded timestamps only exist for v1, v6, v7, which prevents false expectations for v4 UUIDs.

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 sentence with zero waste, front-loaded with the verb and followed by the concrete output payload.

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?

No output schema exists, so the description must explain return values and does so adequately (version, variant, timestamp). It stops short of stating what happens for an invalid or nil UUID, which is the one missing piece for a validation tool.

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 0%, but there is only one parameter with the self-explanatory name 'uuid' and a string type. The description references 'a UUID' implicitly but adds no format, case, or variant constraints beyond that.

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 pair ('validate' and 'report') and resource (UUID) with the exact output fields (version, variant, embedded timestamp). It is trivially distinguishable from all siblings, which are generate_* tools.

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 contrast with the generator siblings—this is the inspection counterpart—but the description never explicitly says when to use it or when not to. No mention of behavior on invalid input or alternatives.

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