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

With no annotations, the description carries the behavioral burden, and it does disclose the meaningful trait that values come from a cryptographically random source (vs. e.g. a pseudorandom token). It says nothing about rate limits, output ordering/format, or uniqueness guarantees across calls.

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 front-loaded sentence with zero waste. Appropriate size for a trivial utility tool.

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, but the tool is simple: one optional parameter fully documented in the schema and a predictable return shape implied by 'values' (plural). Nothing critical is missing, though stating that a list is returned would close the last gap.

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%, so the count parameter (1-100, default 1) is already fully documented in the schema. The description adds nothing about the count behavior, making the baseline 3 appropriate.

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 (Generate) and resource (UUID v4 values) with the added qualifier 'cryptographically random'. It does not explicitly distinguish itself from the sibling random_token, but the resource is specific enough that an agent can tell them apart.

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?

No when-to-use guidance, no mention of when to prefer random_token or hash_text instead, and no exclusions. For a simple generator this is tolerable but the description provides no routing signal to siblings.

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