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

No annotations are provided, so the description carries the full disclosure burden, yet it says nothing about permissions, side effects, network access, or whether the 'shape checks' mutate or discard input. Worse, its one behavioral claim ('number discarded') is inconsistent with a schema whose parameters are all strings, so it conveys negative information.

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?

It is short, but brevity here is under-specification rather than conciseness: the single fragment is front-loaded with wrong information and earns no place in the definition. Nothing in it helps an agent invoke the 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?

With nine optional parameters, no annotations, and no output schema, the description must do substantial work to explain the tool's purpose and behavior. Instead it describes an unrelated unit conversion, leaving the agent with no usable understanding of what the tool accepts or returns.

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 schema itself documents each parameter (e.g. 'Git ref name; discarded after the shape check'), which normally sets a baseline of 3. However, the description's only parameter-adjacent phrase ('number discarded') is irrelevant and misleading for nine string parameters, so it subtracts rather than adds.

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 claims the tool converts centiliters to liters and discards a number, but the input schema defines nine string parameters (ref, url, city, feed, host, json, path, zone, query) describing URL normalization, JSON validation, path checks, timezone lookup and similar shape/validation operations. This is not merely vague — it actively misdirects the agent about what the tool does, and it bears no relation to any sibling (validate-json, iana-zones, normalize-url, file-path-ok, etc.).

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 statement of when to use this tool, when to prefer a sibling, or any precondition. The only clause offered ('number discarded') gives no actionable selection guidance and is misleading given the string-typed parameters.

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