text_diff

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. It does not state whether the tool is read-only, what inputs it expects, what it returns, or any side effects. The cost note is not a behavioral trait.

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 very short, but it is under-specified rather than concise. It omits essential information about what the tool does and how to use it, so the brevity is not efficient.

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?

With no output schema, no annotations, and a vague schema, the description should explain the tool's behavior and return values. It does not, leaving the agent with no idea what 'text diff' returns or how to invoke it correctly.

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 input schema contains only a generic 'params' object with a placeholder description, and the tool description adds nothing about parameter names, types, or meanings. Although schema coverage is formally 100%, the description is uninformative and fails to compensate for the lack of real parameter documentation.

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 is 'text diff — Other Utilities tool. Costs $0.001 USDC via x402.' It merely restates the tool name 'text diff' and adds a category and price, without indicating what the tool actually does (e.g., comparing two texts). This is essentially a tautology, so it scores low on purpose clarity.

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 the many sibling text utilities. The description does not mention any alternatives, prerequisites, or use cases. The only additional information is cost, which is not usage guidance.

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