lookup_modifier

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

With no annotations, the description must disclose behavioral traits. It only describes the purpose (lookup) without addressing permissions, rate limits, data freshness, or what constitutes 'usage' or 'documentation requirements'. The agent lacks insight into potential risks or constraints.

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, concise sentence. While it efficiently conveys the core purpose, it could include more detail without becoming wordy. It earns a high score for lack of fluff but loses a point for being slightly under-specified.

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?

Given the tool's simplicity (one parameter, no output schema, no annotations), the description is incomplete. It does not hint at the return format, whether results are real-time, or what aspects of 'usage' are covered. A more complete description would improve agent confidence.

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 a clear description of the 'modifier' parameter. The tool description adds no additional meaning beyond the schema. Baseline 3 is appropriate since the schema already documents the parameter adequately.

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 action ('Look up') and resource ('billing modifier usage and documentation requirements'). This distinguishes it from sibling tools that handle other billing concepts like bundling, CPT codes, denials, ICD10, and payers.

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 explicit guidance on when to use this tool versus the siblings (e.g., 'for modifier-specific queries, use this; for code definitions, use lookup_cpt'). The intent is implied by the tool name and siblings, but a more direct statement would improve decision-making.

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