Create Budget Line Item

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

The description adds substantial behavioral detail beyond annotations: it explicitly states non-idempotency ('calling it again creates another record'), the successful response (new id with HTTP 201), and common error payloads (401, 403, 404). Annotations only declare idempotentHint=false, so the description enriches that with concrete consequences and error scenarios.

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 the core purpose, followed by behavioral notes, error handling, requirements, and API context. Each sentence adds value, though the endpoint line and required parameters could be seen as somewhat redundant with the schema. Overall it is appropriately sized and 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?

Despite good success/error behavior coverage, the description fails to explain the structure of the budget_line_item object, which is a nested parameter with additionalProperties and no schema detail. Since this is a create tool with no output schema, an agent would need guidance on constructing the payload, but the description omits this critical information. It is incomplete for successful invocation.

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% for both parameters, but the descriptions are minimal ('unique identifier', 'budget Line Item object'). The description repeats the required parameters but adds no structural details about the budget_line_item object, which has additionalProperties and is therefore opaque. It provides no example or field guidance, so it does not significantly enhance schema semantics.

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 starts with 'Add a new line item to a budget' which is a specific verb and resource, and clarifies that calling it again creates another record, distinguishing it from update/delete/show siblings. The explicit HTTP POST endpoint further reinforces the creation purpose.

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 clear context that this tool is for adding new line items, and the endpoint reference implies it is the create operation. However, it does not explicitly state when to use this tool instead of update_budget_line_item or other budget tools, nor any exclusions or alternatives.

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