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

With no annotations, the description carries the full burden of behavioral disclosure. It states 'input discarded' which hints at statelessness, but it does not disclose whether results are persisted, what side effects exist, whether any network or disk access occurs, or what output is returned. This is insufficient for an operation with 10 parameters.

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 only five words, but this is under-specification rather than efficient concision. It lacks an opening statement of core function, no structured breakdown, and no front-loaded purpose. Every word is present, but the description fails to earn its place by conveying necessary information.

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?

Given 10 optional parameters, no output schema, and no annotations, the description is severely incomplete. It does not explain what the tool returns, how parameters interact, why inputs are discarded, or what the expected use case is. An agent cannot reliably invoke this tool based on the provided description.

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 almost no parameter-level meaning beyond 'input discarded', which is already implied by the individual parameter descriptions (e.g., 'discarded after the shape check'). Thus the schema is doing the heavy lifting and the description adds minimal value.

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 phrase 'MD5 hex' suggests the tool computes or returns an MD5 hex digest, but the appended 'input discarded' makes the actual operation ambiguous — it is not clear whether the tool hashes something, validates a shape, or simply ignores inputs. It does not distinguish itself from siblings like fetch-status or normalize-url.

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 guidance is given on when to use this tool versus the 30 sibling tools. There is no mention of conditions, exclusions, or alternatives, so the agent must guess the tool's purpose from its ambiguous name and description.

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