get_balance

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

With no annotations, the description carries the behavioral burden. It identifies the operation as a read-only balance check, specifies that credentials use Basic auth, and names the exact return fields, giving the agent a clear picture of expected behavior.

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 brief and well organized with Args and Returns sections. Every sentence contributes necessary information, and there is no repetition of the input schema.

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 simple read-only balance tool, the description is largely complete: purpose, auth context, and return keys are all covered. The only notable gap is the lack of guidance around optional credentials and behavior when authentication is absent.

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 coverage is 0%, so the description must add meaning. It does explain that both email and password are for Basic auth, but it does not address why they are optional, what happens if omitted, or how to obtain/format them.

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?

Description states a specific verb 'Check' and a precise resource: remaining credits and uploads for the authenticated account. This clearly distinguishes it from siblings such as check_account_status, generate, or get_generation.

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 explains what the tool does but provides no guidance on when to use it versus alternatives, nor any exclusions. With siblings like check_account_status, an explicit usage note would help disambiguate.

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