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

No annotations are provided, so the description carries the full burden. It does not disclose any behavioral traits such as side effects (though 'discarded' hints at no persistence), required permissions, rate limits, or what happens to the input. The term 'discarded' is ambiguous and under-specified; it does not clarify whether the tool validates, transforms, or merely inspects.

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 short, but brevity is not conciseness; it omits essential information. It is under-specified for a tool with 10 parameters and a broad scope, so it fails the test of every sentence earning its place.

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?

With 10 heterogeneous parameters, no output schema, and no annotations, the description is completely inadequate. It does not explain the return value, error conditions, or how the tool processes such diverse inputs, making it impossible for an agent to call it correctly.

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 baseline is 3. The description adds no meaningful semantics beyond what each parameter's description 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?

The description 'Hashids alphabet length, value discarded' is extremely vague and tautological; it does not state what the tool actually does, what resource it operates on, or how it differs from siblings. It gives no indication that this tool accepts a heterogeneous set of parameters (ref, url, city, etc.) and appears to be a generic shape-checking tool, but the description fails to convey that.

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 on when to use this tool versus the many siblings (e.g., domain-shape, file-path-ok, normalize-url). The description does not mention any context, prerequisites, or alternative tools, leaving the agent without direction.

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