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

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

The description adds that only supplied fields are changed (partial update) and that it returns the modified object. Annotations already indicate readOnlyHint=false, destructiveHint=false. The description aligns with annotations but does not disclose error conditions or authorization needs, which is acceptable given annotation coverage.

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 relatively concise at five sentences, with the action stated first and key details like partial update and API endpoint included. Slight redundancy between first and third sentences, but overall 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 basic usage and return value, but given there is no output schema and the tool has a nested object parameter, additional context about the structure of the line item or error handling would improve completeness. Still, it is minimally adequate.

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 each parameter described. The description merely restates the required parameters, adding no new semantics beyond what the schema provides. 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 clearly states it updates a Payment Application Line Item on a Prime Contract, mentions that only supplied fields are changed, and lists required parameters. However, it does not explicitly differentiate from the sibling tool for markup line items, which could cause confusion.

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?

No guidance on when to use this tool versus alternatives (e.g., the markup line item update). It does not mention prerequisites, when not to use, or any specific context for invocation.

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