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

With no annotations, the description carries the full burden. It discloses that the tool returns middleware libraries, SDKs, and systems with outbound links, and explains the search is by capability across every platform. It doesn't mention error handling, pagination, or potential side effects, but as a search/read operation, the behavior is largely transparent. It adds value beyond annotations (which are absent) and covers the core return 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, front-loaded sentence with an em-dash example list, followed by one sentence of parameter guidance. Every clause earns its place, with no filler or redundancy. It is compact yet packed with useful information, achieving top marks for structure and 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 no output schema, the description explains the high-level return (middleware libraries, SDKs, systems with outbound links) and parameter usage. It would be improved by noting the behavior when no parameters are provided (e.g., returns all middleware) or any pagination/ordering, but for a simple search tool, it covers the essentials. The reference to list_capabilities adds contextual completeness for the capability parameter.

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%, so the baseline is 3, but the description enriches each parameter: 'capability' is tied to an exact slug from list_capabilities, 'platform' is explained as an engine/language, and 'query' is illustrated with examples. This goes beyond the basic schema descriptions, providing cross-tool integration and usage context, justifying a 4.

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 searches for reusable software middleware by capability, with specific examples (dialogue, authentication, etc.) and notes it returns libraries, SDKs, and systems with outbound links. This is a specific verb+resource+scope and, while it doesn't explicitly name siblings, the focus on middleware clearly distinguishes it from tools like search_indie.

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 parameter usage instructions: use 'capability' for the exact capability slug (referencing list_capabilities), 'platform' to narrow down, and 'query' for free text. It implies the tool is the go-to for middleware discovery across platforms, but it does not explicitly exclude alternatives or state when not to use it. This is clear context without explicit exclusions, earning a 4.

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