justwatch_popular

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

The description mentions it uses a GraphQL endpoint and reinforces type/limit behavior, but lacks details on rate limits, side effects, or return format, which is moderate given no annotations.

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 two sentences, front-loaded with purpose, and efficient with no wasted words.

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?

The description covers the main functionality and key parameters but does not explain optional parameters (country, language) or output structure, which is an adequate baseline for a simple tool.

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 schema covers all parameters (100%), and the description adds specific constraints like 'Type accepts only all, movie, or show' and 'limit defaults to 20 and clamps to 50', providing extra clarity.

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 gets popular JustWatch titles, and it distinguishes from sibling tools like justwatch_search or justwatch_discover by focusing on popular items.

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 parameter constraints (type and limit) but does not give guidance on when to use this tool over alternatives, such as justwatch_search for searching or justwatch_discover for browsing.

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