PostCarts

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

No annotations are provided, so the description carries full burden. It states 'Create a cart', implying a write operation, but does not disclose behavioral traits such as permissions needed, whether it's idempotent, rate limits, or what happens on success/failure. This is inadequate for a mutation tool with zero annotation coverage.

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 concise with a single sentence, 'Create a cart.', which is front-loaded and wastes no words. However, this brevity comes at the cost of clarity and completeness.

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 tool creates a cart (a mutation), has no annotations, no output schema, and one undocumented parameter, the description is completely inadequate. It fails to provide necessary context for safe and effective use, such as return values, error handling, or operational constraints.

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 has one parameter ('fields') with 0% description coverage. The tool description adds no information about parameters, failing to compensate for the schema gap. It does not explain what 'fields' should contain or its format, leaving it undocumented.

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 'Create a cart' restates the tool name 'PostCarts' in different words, making it tautological. It specifies the verb 'Create' and resource 'cart', but lacks detail about what a cart is in this context or how it differs from sibling tools like 'PostCartsIdComplete' or 'PostCartsIdLineItems'.

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?

No guidance is provided on when to use this tool versus alternatives. It does not mention prerequisites, context, or exclusions, leaving the agent to infer usage from sibling tool names alone, which is insufficient.

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