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

Annotations already provide readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description adds meaningful behavioral context by explaining that the tool attests environment identity and that callers must verify the database-target match before proceeding. It goes beyond the annotations without contradicting them.

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 four sentences with no filler. It front-loads what the tool attests, then delivers essential pre-write guidance, verification criteria, and a warning. Every sentence contributes distinct value, making it efficient and well-structured.

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 zero parameters, a rich output schema, and annotations covering the read-only safety profile, the description is complete for an agent. It explains why, when, and how to use the tool, including the guardrails needed for safe writes. Nothing essential is 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 tool has zero parameters, so there is nothing for the description to explain about inputs. Per the rubric, 0 params earns a baseline of 4, and the description appropriately focuses on the tool's purpose and usage rather than inventing parameter details.

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 opens with a specific verb ('Attest') and names the exact resources: stage, base URL, non-secret database fingerprint, database-target match, Lambda identity, region, and authorization role. This clearly distinguishes it from the many sibling getters by describing a unique environment-verification purpose.

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 description explicitly states when to call this tool: 'Call this before any write.' It also gives concrete follow-up actions, such as requiring databaseTargetMatchesExpected=true, comparing against the canonical environment table, and passing the exact stage and fingerprint to guarded write tools. This is strong, actionable usage guidance.

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