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

The description goes well beyond the readOnlyHint and destructiveHint annotations by detailing return shape, row types, id alignment behavior, hidden_zero_rows counting, filter application semantics, and no_data handling. It also discloses edge cases like ignored parameters being absent from filters, which is valuable behavioral context.

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 dense sentence, but every clause carries useful information about report output structure and edge cases. It is front-loaded with the tool's purpose and then covers return semantics efficiently. It could be split into shorter sentences for readability, but there is little waste.

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?

Despite having no output schema, the description comprehensively explains the return structure, row types, id alignment, zero-row omission, filter reporting, and no_data state. The input schema already covers parameters, so an agent has everything needed to correctly invoke and interpret this read-only report tool.

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 coverage is 100%, so the baseline is 3. The description adds meaning beyond the schema by explaining how filter parameters are reflected in the output: filters lists what QuickBooks confirmed applied, and an ignored parameter is absent. This helps the agent interpret parameter effects and diagnose failed filtering.

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 a specific action and resource: 'Generate the QuickBooks vendor expenses report.' This distinguishes it from vendor balance and transaction-list tools by name. However, it does not explicitly differentiate itself from sibling reporting tools such as get_customer_income or get_profit_and_loss.

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 no guidance on when to choose this tool over alternatives, nor any exclusions or prerequisites. The intended use is only implied by the report name 'vendor expenses.' There is no mention of when a different report like get_vendor_balance_detail would be more appropriate.

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