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

Annotations declare readOnlyHint=true, so the safety profile is covered. The description adds the underlying endpoint (GET /api/4/product_groups) and hints at returned fields in parentheses, but does not disclose pagination behavior, rate limits, or other operational traits beyond what the schema and annotations already imply.

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 front-loaded with the core purpose, followed by a concise clarification of the resource and a single endpoint reference. It is appropriately sized, though the raw endpoint line adds little for an agent invoking the MCP tool.

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 8 optional parameters, no output schema, and only readOnlyHint annotations, the description provides key domain context about what a product group is and how it relates to bookable products. It falls short only on operational details like pagination behavior, which the schema already partially covers.

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 all eight parameters are well documented in the schema itself. The description adds no parameter-specific syntax or format details beyond what the schema provides, making the baseline score of 3 appropriate.

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?

States a specific verb (List) and resource (product groups), then defines what a group is: catalogue entries with name, SKU, product type, tracking type, and pricing, and clarifies that a group holds one or more bookable products (variations). This distinguishes it from sibling list tools like booqable_list_products.

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 usage through the definition of a product group and its relationship to products, but does not explicitly state when to use this tool versus alternatives such as booqable_list_products or search-oriented tools. No exclusions or prerequisites are given.

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