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

Annotations already declare readOnlyHint=true and openWorldHint=false. The description adds meaningful non-obvious behavior: it uses a cryptographic generator (security quality) and stores nothing (statelessness), which goes beyond the annotations. It does not cover rate limits or output format, but the added security and statelessness context is valuable.

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?

Three short sentences, front-loaded with the key action and constraints. 'Free' is slightly promotional but still informative and does not dilute the message.

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, stateless utility with a complete schema and annotations covering safety, the description supplies the essential context (cryptographic quality, no storage). No output schema is needed for a tool that plainly returns a string.

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 the single parameter is fully documented in the schema. The description repeats the 8–128 range but adds no syntax, default, or edge-case semantics beyond what the schema already 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?

States a specific verb and resource ('Generate a random password') with a concrete length range and the method (cryptographic generator). No sibling tool handles password generation, so there is no ambiguity despite the large sibling list.

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 purpose makes the primary use case obvious, and 'Nothing is stored. Pure computation' clarifies the stateless context. However, it does not explicitly state when to prefer this over a sibling like bursia_uuid for random identifiers, nor does it name any exclusion.

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