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

With no annotations provided, the description carries the full burden of behavioral disclosure. It does reveal that the tool retrieves up-to-date docs and imposes a 3-call limit, but it does not describe the return format, error handling, or any side effects. This is partial transparency but not comprehensive, earning a middle score.

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 concise and front-loaded. The first sentence states the purpose, the second gives the crucial prerequisite, and the third sets a usage restriction. Every sentence earns its place, with no filler or redundant information.

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 output schema and no annotations, the description provides enough to begin using it but does not specify what the returned documentation looks like or how errors are communicated. The prerequisite and call limit are useful, but more detail about return values and failure modes would make it more complete.

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 100%, so the baseline is 3. The description reinforces the need to obtain libraryId from resolve-library-id, but this information is also present in the schema. The query parameter examples are helpful but already in the schema. No significant additional semantic value is provided.

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 function: retrieving and querying up-to-date documentation and code examples from Context7 for any library or framework. It uses specific verbs ('Retrieves and queries') and a specific resource ('documentation and code examples from Context7'), which distinguishes it from sibling tools like microsoft_docs_search or npmSearch.

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 explicit usage guidelines: it requires calling resolve-library-id first unless the user supplies an ID in a specific format, and it sets a hard limit of 3 calls per question with a fallback instruction. However, it does not mention alternative tools or when not to use this tool, so it misses the 'alternatives' part of the rubric.

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