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 discloses none: no side effects, no safety characteristics, no failure modes, no return behavior. The only behavioral hints live buried in parameter descriptions, not in 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 extremely short, but this is under-specification rather than disciplined conciseness. With 10 heterogeneous parameters and no output schema, a single vague sentence does not earn its place as a useful tool definition.

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?

The tool is complex enough with 10 distinct optional parameters, no output schema, and no annotations, yet the description provides no context about what the tool returns, which parameters to combine, or what calling it accomplishes. The schema descriptions are individually helpful, but the tool-level context is almost entirely missing.

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 input schema covers all 10 parameters at 100%, so a baseline of 3 is appropriate. The parameter descriptions add useful semantics like 'discarded after the shape check' and 'no disk access,' though the main description contributes nothing about how the parameters relate or which ones are relevant in which scenarios.

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, 'Small public utility for autonomous clients,' essentially restates the tool's generic name and gives no specific verb or resource. It does not indicate what the tool actually does or how it differs from the many specific sibling tools like normalize-url, validate-json, or timezone.

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 the extensive set of sibling tools. No mention of conditions, preferred use cases, or exclusions, so an agent cannot determine whether to select this tool or one of the more specific alternatives.

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