Update Payment Application (Owner Invoice) Markup Line Item For Prime Contract

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

Annotations already indicate readOnlyHint=false (modification) and destructiveHint=false. The description adds that it returns the modified object on success and lists required parameters. It does not disclose side effects, permission requirements, or behavior on partial updates. No contradiction with 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 functional and front-loaded with the action. It includes API info and endpoint. However, it is slightly repetitive (e.g., 'Prime Contract Payment Application (Owner Invoice)' appears twice). Still, it is reasonably concise.

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?

No output schema is provided, so the description's mention of 'returns the modified object on success' is helpful. It covers required params. However, it omits details about the nested object structure, pagination, or error scenarios, leaving gaps for a developer to infer from the API.

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% with descriptions for all four parameters. The description lists required parameters but adds no new information beyond the schema. The nested object `payment_application_markup_line_item` is described only as 'Payment Application (Owner Invoice) Markup Line Item' with no further structure details.

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 tool updates a Payment Application (Owner Invoice) Markup Line item on a prime contract, using specific verb 'Update' and resource. It distinguishes from siblings like update_payment_application_owner_invoice_for_prime_contract (whole invoice) and update_payment_application_owner_invoice_line_item_for_prime (line item) by focusing on markup line 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?

It mentions 'only the supplied fields are changed' which provides partial guidance. However, it does not explicitly state when not to use this tool versus alternatives like creating a new markup line item or using bulk updates. No exclusions or context are given.

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