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

Annotations already declare readOnlyHint=true, so the safety profile is covered. The description adds the Product Catalog version and endpoint, which is useful context, but it does not disclose any additional behavioral details such as default limits, pagination behavior, or sorting.

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 three short, purposeful sentences with no filler. The core action and resource are front-loaded, and the filter behavior and endpoint are provided without redundancy.

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 read-only list operation with fully documented parameters and a readOnlyHint annotation, the description covers the essential information. It does not describe the response shape or default pagination limits, but these are not critical given the low complexity and available schema.

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?

Schema description coverage is 100%, so each parameter is already documented in the schema. The description only adds a brief 'Filter by item' hint, which does not add meaning beyond what the schema's item_id description already provides.

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?

Description clearly states the action 'List', the resource 'Product Catalog 2.0 item prices', and the filter behavior. Including the Chargebee API endpoint reinforces the specific scope and distinguishes this from sibling tools like list_items.

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 implies use when a user needs item prices, especially filtered by a specific item. However, it does not explicitly state when to choose this tool over alternatives like list_items or provide any exclusions.

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