user_stats

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 describes a 'get' operation (implying read-only), but it does not explicitly state that it is non-destructive, mention authentication requirements, or describe any potential side effects. For a simple read operation, this is a minimal disclosure.

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 sentence with no wasted words. It is front-loaded with the action and resource, and every part contributes to clarity.

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?

While the description states what is included, it does not describe the return format or structure, and there is no output schema. For a simple tool with no parameters, the description is adequate but could be more complete by indicating the response type (e.g., object) or additional fields.

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?

With zero parameters, schema description coverage is trivially 100%. The description adds value beyond the schema by specifying the content of the statistics: 'completed pages and unlimited pages status', which gives meaning to the empty input.

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: 'Get user statistics including completed pages and unlimited pages status'. It uses a specific verb (Get) and resource (user statistics), and the sibling tools are in different domains (billing, email, files, tasks), so there is no ambiguity or confusion with alternatives.

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 does not provide explicit guidance on when to use this tool versus alternatives, nor does it mention any prerequisites or exclusions. However, the context (retrieving user stats) is clear enough that an agent can infer usage when needing these specific statistics.

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