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

The description adds the API endpoint and response fields, but annotations already include readOnlyHint=true. No additional behavioral traits beyond the read-only nature are disclosed.

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 short, clear, and in two sentences with no extraneous information. The key purpose and specific response fields 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?

Given no input parameters and no output schema, the description adequately covers what the tool does and what it returns by listing the three fields. No additional context is needed for this simple read operation.

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 zero parameters and 100% schema coverage from the input schema, the description does not need to add parameter details. Baseline 4 is appropriate as there is no missing parameter information.

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 tool retrieves account details and lists specific fields (api_usage, api_quota, paid_plan_name). It distinguishes from sibling tools like bannerbear_get_template which focus on other resources.

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 does not explicitly state when to use this tool versus alternatives, but given that it's the only account-related tool among siblings, context is implied. No exclusions or alternative recommendations are provided.

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