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

Annotations provide readOnlyHint=false and destructiveHint=false, which already establish that this is a mutating but non-destructive write operation. The description adds no behavioral traits beyond that, such as side effects, permissions, or impact on QuickBooks data. There is no contradiction with the 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 a single, front-loaded sentence with no filler or redundant wording. It is concise, though it forgoes the opportunity to add useful context; still, it earns its place as a clear statement of the operation.

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 gives the core operation, and the schema's entity description covers the important field-level restrictions and the required AccountType. However, the overall definition is minimal: it doesn't clarify the exact kind of account, provide sibling differentiation, or describe what happens after creation. This is adequate but not rich.

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 the schema already documents the required 'entity' object and optional 'company' parameter. The description adds no parameter-level meaning, but because the schema is thorough, a baseline score of 3 is 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?

The description states a clear verb and resource: 'Create an account in QuickBooks Online.' The word 'account' plus the surrounding sibling tools (get_account, update_account, search_accounts) makes the target resource identifiable. It is slightly less specific than it could be because it doesn't say 'chart of accounts account,' but it is not tautological or misleading.

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?

There is no guidance about when to use this tool versus alternatives like update_account or search_accounts, nor any mention of prerequisites or setup. The description only states the action without contextual direction.

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