getUserStats

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. 'Get user statistics' implies a read-only operation but doesn't specify authentication needs, rate limits, error conditions, or what the output looks like. For a tool with zero annotation coverage, this is inadequate behavioral transparency.

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 concise with just three words, which is efficient and front-loaded. However, it's arguably too brief given the lack of other context, bordering on under-specification rather than optimal 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 complexity of user statistics (which could include various metrics), no annotations, and no output schema, the description is incomplete. It doesn't explain what statistics are returned, how they're formatted, or any behavioral nuances, making it insufficient for an agent to use the tool effectively.

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 input schema has 100% description coverage, with the parameter 'collectionId' documented as 'Collection ID for specific collection stats'. The description adds no additional parameter information beyond what the schema provides, so it meets the baseline score of 3 for high schema coverage.

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 'Get user statistics' clearly states the verb ('Get') and resource ('user statistics'), making the basic purpose understandable. However, it doesn't distinguish this tool from sibling tools like 'getUserInfo' or specify what kind of statistics are retrieved, leaving the purpose somewhat vague.

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 like 'getUserInfo' or other sibling tools. There's no mention of prerequisites, context, or exclusions, leaving the agent with no usage direction beyond the tool name.

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