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

No annotations exist, so the description carries the full burden. "input discarded" does disclose a real behavioral trait (no retention, likely no side effects), which is more than nothing, but it says nothing about what is returned, whether the 9 heterogenous inputs are validated, or any auth/rate-limit behavior. It also sits in mild tension with the schema, which says values are discarded only after a 'shape check' or 'length check'.

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?

Six words with the result-type hint front-loaded, so it is not padded. However, the brevity comes at the cost of comprehensibility rather than being efficient communication.

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?

For a tool exposing nine distinct optional parameters with no output schema and no annotations, the description explains neither the parameter set nor the return value or its format. An agent has no way to predict behavior or select this tool over any sibling.

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 defines ref, url, city, feed, host, json, path, zone, and query. The description adds only the claim that input is discarded, implying parameters do not affect the result, which is marginally useful but does not explain why nine unrelated input types exist.

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?

"SHA3-512 hex length, input discarded" largely restates the tool name and adds only a fragment of what it produces (a hex length). There is no clear verb identifying the action performed or the resource acted on, so an agent cannot confidently say whether this hashes anything, validates anything, or returns a constant.

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 when-to-use, when-not-to-use, or alternative tooling is mentioned, despite many sibling tools (compatibility, domain-shape, search-query-len, validate-json, etc.) that plausibly overlap. The description is not misleading, but it offers zero routing guidance.

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