list_watchproviders_movies

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

The annotations already declare readOnlyHint=true and idempotentHint=true, so safety is covered. The description adds the HTTP endpoint and the parameter name, but no behavioral details such as what the response contains, whether results are filtered by region, pagination, or any other behaviors. The endpoint is context, but not 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 concise and front-loaded with the action. Including the endpoint is useful, and the structure is clear. However, the 'Args' section merely restates the schema parameter, adding little value, so it could be trimmed. Overall, it is efficient and well-structured.

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 one optional parameter and an output schema, the description is under-specified. It does not clarify what 'watch provider movies' means, how watch_region affects results, or how this differs from list_watchproviders_tv. The output schema may describe return values, but the tool's purpose and parameter semantics remain vague enough that an agent might mis-select or misuse it.

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 0%, so the description carries the full burden. It only states 'watch_region: Query parameter,' which adds no meaning beyond the schema's property label 'Watch Region,' type string/null, and default null. It does not explain the allowed format (e.g., ISO 3166-1 alpha-2), whether it is required, or how it filters results.

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 a specific verb and resource: 'Get watch provider movies.' The resource 'movies' distinguishes it from sibling list_watchproviders_tv, and the name itself further clarifies. However, it does not explicitly differentiate from siblings like list_watchproviders_tv or list_watchproviders_regions, and the meaning of 'watch provider movies' could be interpreted as movies from providers or providers offering movies.

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?

There is no guidance on when to use this tool versus alternatives. It does not mention that it is for movies (vs. TV) or that watch_region filters by region, and it does not reference sibling tools. An agent would have to infer usage from the name alone.

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