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

With no annotations provided, the description must carry the full behavioral burden. It states the output is a secure random password and mentions pricing, but it does not disclose the output format, default length, whether symbols are included by default, or any constraints on the length parameter.

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 very brief and front-loaded, with no wasted words. The compact query example and price are efficient, though the telegraphic style omits explicit parameter explanations and a clear verb.

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?

Given no annotations, no output schema, and 0% schema coverage, the description is incomplete for reliable invocation. An agent cannot confidently determine default behavior, parameter semantics, or response shape without additional inference.

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 needs to compensate. The example implies 'len' means length and 'symbols' toggles symbol inclusion, but this is never explicitly stated. The description does not explain parameter types, defaults, or valid ranges.

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 phrase 'Secure random password' clearly identifies the tool's output and purpose, distinguishing it from sibling tools like api_random or api_uuid. However, it lacks an explicit verb like 'generate' or 'return', so the purpose is slightly implied rather than fully stated.

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?

There is no guidance about when to use this tool versus alternatives such as api_random or api_uuid. The example query '?len=16&symbols=1' hints at usage but does not explain conditions, prerequisites, or when another tool would be more appropriate.

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