Check Competitive Price Position

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

Annotations already indicate read-only and non-destructive behavior. The description adds value by detailing the return fields (percentile_rank, price_index_label, position, category, last_refreshed, cta) and constraints (price must be >0 and <=10000). No contradictions with annotations.

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 well-structured with a clear purpose statement, bullet-point return values, and parameter explanations. It is concise, front-loaded, and every sentence adds value.

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's simplicity (2 required params, no enums, no output schema), the description covers all necessary aspects: purpose, usage context, parameter constraints, and return values. No gaps.

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 no descriptions (0% coverage), but the description compensates by providing clear explanations for both parameters: price format and range, category exact names and case-insensitivity, and a recommendation to use list_categories. This fully compensates for the schema gap.

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 clearly states the tool's function: 'Percentile-rank a single product price against tracked Amazon competitors in a CPG category.' It provides specific use cases (e.g., checking if a $4.99 granola is competitively positioned) and distinguishes it from sibling tools like compare_products and list_categories.

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 gives explicit guidance on when to use this tool ('Use when a multi-channel CPG brand asks where their Amazon listing price sits...') and suggests calling list_categories first to confirm category names. However, it does not explicitly state when not to use it or mention alternatives like compare_products.

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