Usage And Billing MCP Server

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. 'Get Usage' reveals nothing about whether this is a read-only operation, what permissions are required, whether it has side effects, rate limits, or what the response format might be. For a tool with zero annotation coverage, this description is completely inadequate in describing behavioral traits.

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?

While 'Get Usage' is technically concise with only two words, it represents under-specification rather than effective conciseness. The description fails to convey essential information that would help an AI agent understand and use the tool correctly. Every word should earn its place, but here the minimal text doesn't fulfill the description's purpose.

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 the lack of annotations, no output schema, and a vague description, this tool definition is severely incomplete. The description doesn't explain what 'usage' means in this context, what data is returned, or how this tool differs from sibling tools like 'report_usage'. For a tool that presumably retrieves important usage data, this description provides insufficient context for effective use.

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 has zero parameters, and schema description coverage is 100%, so there are no parameters to document. The description doesn't need to compensate for any parameter documentation gaps. A baseline score of 4 is appropriate since there's no parameter information to provide beyond what the schema already indicates (no parameters).

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 'Get Usage' is a tautology that essentially restates the tool name without adding meaningful context. It doesn't specify what kind of usage is retrieved (e.g., API usage, billing usage, system usage) or what resource is being accessed. While it includes a verb ('Get'), it lacks specificity about the target resource or scope.

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 provides no guidance on when to use this tool versus alternatives. There are multiple sibling tools that might retrieve usage-related data (e.g., 'report_usage'), but the description doesn't differentiate this tool from them or indicate appropriate contexts for its use. No prerequisites, exclusions, or alternatives are mentioned.

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