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

With no annotations, the description carries the full burden of behavioral disclosure. It does not state what happens for invalid input, whether it returns a pass/fail or detailed metadata, or what the output looks like. The output schema exists but is not described, so the agent is left without key behavioral context.

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 a single compact sentence with no wasted words. It front-loads the core purpose, though the initial 'UUID Validator' repeats the name/title. Overall it is efficient and scannable.

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 simple (one param, no annotations, output schema present), but the description leaves critical gaps: no parameter guidance, no usage distinctions, and no behavioral notes. An agent cannot confidently determine what value to pass or what result to expect without additional information.

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 0%, so the description must explain the parameter 'q'. It never mentions 'q' or its expected format (e.g., canonical UUID string). The only hint is the word 'UUID' in the description, which is insufficient to know what value to pass.

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 validates UUIDs and detects version and variant for v1-v5, naming the specific resource (UUID) and the two operations. It is distinct from a bare 'validate' tautology, but does not explicitly differentiate itself from the sibling tool 'uuid'.

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 implies when to use this tool: when you have a UUID and need to know its version/variant. However, it provides no explicit alternatives or exclusions, and with a sibling literally named 'uuid' the distinction is left to the agent to infer.

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