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

The annotations already declare readOnlyHint, idempotentHint, non-destructive, and closed-world behavior, so safety is covered. The description adds valuable scope context by listing the categories of account data returned and explicitly excluding contact details, which prevents an agent from expecting contact information.

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 efficient sentence that front-loads the account-plan purpose and then lists the additional returned information. Every clause adds scope detail without redundancy.

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 zero-parameter read tool with rich annotations and no output schema, the description adequately explains what categories of account information are returned and what is excluded. It does not describe the response shape, but the content categories and exclusion are sufficient for an agent to decide whether to call it.

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 takes zero parameters, which is the baseline 4 under the scoring rules. There are no parameter semantics to clarify, and the description does not introduce misleading parameter expectations.

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 identifies the specific resource (the account) and enumerates what information it returns: plan, download access status, PDF export requirements, and connection permissions. It is clear and distinguishable from resume-focused siblings, though it does not explicitly name when a sibling like export_pdf should be preferred.

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?

Usage is implied rather than stated: an agent can infer this is for checking account plan, permissions, and export prerequisites before performing related actions. There is no explicit when-to-use, when-not-to-use, or alternative-tool routing guidance.

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