open_bill

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

With no annotations, the description carries the full burden and offers only 'Open a bill,' with no consequences, state change, permissions, or return behavior. An agent cannot tell if this is a read, status transition, or side effect.

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 extremely short but under-specified rather than concise. It omits essential context and does not use structure to clarify behavior.

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?

For a tool with no annotations and no output schema, a one-sentence definition leaves major gaps: what 'opening' does, whether the bill status changes, and what the response contains. Sibling tool names such as get_bill and update_bill only heighten the ambiguity.

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 0% and the description adds no explanation beyond the schema's id field. The id parameter is conventional enough to infer it identifies the bill, but the description provides zero semantic detail.

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 merely restates the tool name with a generic verb and no object scope. 'Open' is ambiguous between retrieving, marking as open, or updating a bill, and nothing distinguishes this from get_bill, update_bill, or list_due_bills.

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 information is provided about when to use this tool over siblings or when not to use it. The absence of alternatives and conditions leaves an agent without decision criteria.

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