prevent_reinvention_check

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It states the tool checks for existing functionality but doesn't describe how it performs this check (e.g., search methods, data sources), what the output entails, or any limitations (e.g., rate limits, accuracy). This leaves significant gaps in understanding the tool's behavior.

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, efficient sentence that directly states the tool's purpose without unnecessary words. It is appropriately sized and front-loaded, making it easy for an agent to quickly grasp the intent, earning a high score for conciseness.

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 moderate complexity (checking functionality in packages), no annotations, and an output schema present (which should cover return values), the description is minimally adequate. It states what the tool does but lacks details on behavior, usage context, or parameter guidance, making it incomplete for optimal agent use.

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?

The description adds no meaning beyond the input schema, which has 0% description coverage for the single parameter 'functionality_description'. Since there's only one parameter and no schema details, the baseline is 3, as the description doesn't compensate for the lack of schema information but doesn't worsen it either.

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's purpose as checking if functionality might already exist in known packages, using a specific verb ('check') and resource ('functionality in known packages'). However, it doesn't explicitly differentiate from sibling tools like 'discover_packages' or 'explore_existing_apis', which may have overlapping purposes, preventing a score of 5.

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 no guidance on when to use this tool versus alternatives. It doesn't mention prerequisites, context, or exclusions, and with siblings like 'discover_packages' and 'explore_existing_apis', there's no indication of how this tool differs in usage, leaving the agent without clear direction.

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