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

Annotations indicate readOnlyHint=true and destructiveHint=false. The description adds behavioral context beyond annotations, such as access restrictions for FREE businesses and prerequisite calls. It does not contradict annotations and provides useful additional behavior insights.

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 purpose and efficiently provides guidelines in subsequent sentences. While every sentence is necessary, the multiple conditional instructions make it slightly less concise; however, it is well-structured.

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?

The description covers usage context thoroughly (permissions, prerequisites, edge cases) but lacks parameter descriptions and output details. Since there is no output schema, omitting return value information reduces completeness for an agent.

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 0% with 2 required parameters (challengeId, communityId). The description does not explain these parameters or their formats, leaving the agent to infer them solely from names. This is a significant gap given no schema coverage.

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 verb 'get' and resource 'upsells available for a challenge,' distinguishing it from siblings like 'get_upsell' or 'list_upsell_products' by specifying the 'challenge' context. However, it could be more explicit about whether it retrieves a list or a specific set.

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 provides explicit instructions: check business permissions, note that FREE businesses cannot use it, call check_business_tool_access beforehand, handle grace-period warnings and resubscribe links, and never proceed when access is blocked. This fully addresses when and how to use the tool versus alternatives.

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