swap_case

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

The description discloses the cost ($0.001 USDC via x402) and the category, but does not describe the actual transformation behavior, side effects, or return format. Since no annotations exist, the description carries the full burden and falls short.

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 extremely brief and under-specified, repeating the tool name followed by a category and cost. It is not a tautology but lacks essential behavioral information, making it under-specified rather than concise.

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 text transformation, the description is minimal, lacking explicit input/output details and differentiation from similar case-manipulation tools. The payment disclosure is helpful, but overall the context is incomplete.

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 schema only contains a generic 'params' object with no specific parameter definitions, and the description adds no parameter details. The implication that text should be passed is present only in the tool name, not in the description or schema.

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 tool as a 'Text & Encoding tool' and the name 'swap_case' clearly implies toggling letter case. However, it does not explicitly explain the operation or distinguish it from sibling tools like invert_case or convert_case, relying on the name alone.

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?

There is no guidance on when to use this tool versus alternatives such as convert_case or invert_case, and no mention of input requirements. The only extra information is the cost, which does not serve as usage guidance.

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