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

With no annotations provided, the description carries the full burden of disclosing behavior, but it reveals nothing about side effects, safety, errors, output, or state changes. The tool description itself contains no behavioral traits beyond the uninformative 'utility' label; schema-level notes like 'discarded after the call' are not part of the tool description.

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 short, but brevity here is under-specification rather than conciseness. It front-loads no useful information about the tool's operations or parameters, and a one-line generic label does not earn the space for a 10-parameter 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?

This tool has 10 unrelated optional parameters, no required parameters, no output schema, no annotations, and virtually no tool description. An agent cannot determine which parameter to pass, whether multiple parameters are allowed, what each invocation returns, or how this utility relates to its many sibling tools.

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 tool description adds no parameter-level meaning, but the input schema covers all 10 parameters with individual descriptions, giving 100% schema description coverage. Per the baseline for high schema coverage, this is adequate even though the description itself is silent on parameters.

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 says only 'Small public utility for autonomous clients,' which restates the 'util' part of the tool name and gives no concrete verb, resource, or function. It does not distinguish this tool from the many sibling tools that also appear to be utilities, and it never states what the tool actually does.

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 instead of the sibling tools such as validate-json, normalize-url, timezone, weather-hint, or inspect-robots. The description provides no conditions, exclusions, or alternatives, leaving the agent to infer usage from the parameter schema alone.

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