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

With no annotations, the description must carry the transparency burden. It discloses the core side effect (marks warranty as breached) and the return value (signed breach record). However, it omits details like permissions required, irreversibility, failure modes, or the structure of the breach record, which are relevant for a mutating tool.

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 opening sentences are concise and front-loaded, stating the action and outcome. However, the final two sentences about 'reference-grade implementation' and 'Layer B' are cryptic and may add noise, though they are short and do not significantly detract from clarity.

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 simple mutation tool with no output schema, the description covers the main action and result but lacks prerequisites (e.g., warranty must exist), detailed output format (what is in the signed record), and error conditions. The reference to 'production-grade is Layer B' is vague and does not enhance operational understanding.

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 already provides descriptions for all three parameters (100% coverage), so the description does not need to compensate. It adds no extra parameter-level meaning beyond what is in the schema, so the baseline of 3 is appropriate.

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 clearly states the action ('Report a warranty breach') and specifies the state change ('Marks the warranty as breached') and the output ('returns a signed breach record (C18)'). This distinguishes it from sibling tools like attest_warranty_get and attest_warranty_issue, which serve different purposes.

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?

The intended use is implied: use when you need to report a warranty breach and obtain a signed record. However, there is no explicit guidance on when not to use this tool or mention of alternatives, leaving the agent to infer the scope from the tool name and siblings.

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