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

There are no annotations, and the description does not disclose any side effects, permissions, or behaviors. The schema descriptions like 'discarded after the shape check' hint at some internal logic, but the main description gives no transparency about what the tool actually does.

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 extremely short, which is concise, but it is a fragment rather than a complete sentence. It lacks a verb and any structured explanation, making it poorly formed despite its brevity.

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 the complexity of 9 optional parameters and the absence of an output schema, the description provides no context on how to invoke the tool or what results to expect. It is severely incomplete, leaving the agent with no actionable information beyond the tool's name.

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?

The schema lists 9 optional string parameters with generic descriptions (e.g., 'Git ref name', 'HTTPS URL to normalize or cite', 'City name') that are unrelated to KSUID. There is no indication of which parameter should be used as the KSUID input, making the parameters meaningless in this context.

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 'KSUID character length' is essentially a restatement of the tool name without a verb or clear action. It does not explicitly state what the tool does (e.g., 'checks' or 'returns' the length), making it a tautology rather than a clear purpose.

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 guidance is provided on when to use this tool versus similar sibling tools like 'search-query-len' or 'memory-key-count'. There is no mention of scenarios, prerequisites, or alternatives.

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