get_user_stats

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

No annotations are provided, so the description carries full burden for behavioral disclosure. It does not indicate whether this is a read-only operation, whether it requires authentication, or what the returned data structure looks like. The description is too vague to inform an agent about side effects or constraints.

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 extraneous information. However, it is arguably too brief; while concise, it sacrifices clarity for brevity.

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 and no annotations, the description is insufficient. It does not explain what constitutes 'watch statistics' (e.g., count, hours, unique titles), nor does it clarify if the stats are for the current user or require a user parameter. This lack of completeness makes it hard for an agent to determine if the tool meets the need.

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% with one parameter ('timeRange') well-described in the schema (type, default, description). The description adds no extra semantic meaning beyond what the schema already provides, meeting the baseline of 3.

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 states 'Get user-specific watch statistics', which clearly indicates the verb (get) and resource (watch statistics). However, it lacks specificity on what 'user-specific' means (e.g., current authenticated user or a given user ID). Given sibling tools like 'get_watch_stats' and 'trakt_get_user_stats', the description does not differentiate this tool from similar ones.

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?

No usage guidelines are provided. The description does not specify when to use this tool over alternatives like 'get_watch_stats' or 'trakt_get_user_stats'. There is no mention of prerequisites, context, or exclusions.

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