get_aws_member_account

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

Annotations already establish read-only and non-destructive behavior, and the description adds useful data-boundary details: six-month monthly stats, 30-day coverage, YTD/lifetime savings clamping, and parent-organization attribution. This 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 bullet list is well-structured and informative, but the opening sentence reads as a product tagline rather than a tool description and adds noise. The rest of the description is reasonably lean, though not as tight as best-practice examples.

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 no output schema, the description compensates well by enumerating monthlyStats, dailyCoverage, savingsTotals, and monthlyPotentialSavings with relevant time windows. It lacks parameter-relationship context and alternative tool guidance, but for a read-only single-account getter with good annotations, it is largely complete.

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?

With only 25% schema description coverage, the description needed to clarify parameters, but it does not explain managementAccountId, memberAccountId, or X-Tenant-Id directly. The names and patterns hint at AWS account IDs, and the text references 'parent organization,' yet this is too indirect to compensate for the low schema coverage.

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 that the tool returns a single member AWS account with commitment and savings statistics, including specific aggregates. It distinguishes itself from list-oriented siblings by emphasizing 'single' and the Overview-view data scope, though it does not explicitly differentiate from get_aws_account or list_aws_member_accounts.

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 implies the tool is for populating the member-account Overview view with trailing-window stats, which provides a clear context. However, it gives no explicit when-to-use vs alternatives guidance and does not mention exclusions or sibling tools.

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