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

The annotations already convey read-only, idempotent, non-destructive behavior. The description adds valuable context beyond that by requiring authentication and confirmation and by disclosing what is returned. This is useful for an agent handling a security-sensitive retrieval, and no contradiction with annotations exists.

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 a single tightly-packed sentence followed by two short clear components ('Required...' and 'Returns...'). Every element carries meaning, and the essential preconditions are front-loaded.

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 low-complexity, read-only tool with a straightforward schema, the description covers the required states, the security confirmation, and the returned data despite no output schema. It is nearly complete, but the absence of any guidance about the closely related checkAccessKeyStatus is a minor gap.

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 67%, with confirmRetrieval and feedback already well-described in the schema. The description only references 'confirmation' generically and provides no additional semantics for _requestId or for how the parameters interact at a higher level does. It neither compensates for the undocumented parameter nor adds much beyond the schema.

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 uses the specific verb 'Retrieve' with the resource 'authenticated user access key' and clearly states the return payload ('access key, metadata'). This makes the tool's primary action and scope unambiguous, and distinguishes it from siblings like checkAccessKeyStatus.

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 notes that authentication and confirmation are required, which gives some usage context. However, it does not explicitly state when to prefer this tool over related siblings such as checkAccessKeyStatus or getAccountDetails, leaving the selection context implied.

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