List TMDB Movie Genres

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

With no annotations provided, the description bears the full burden of behavioral disclosure. It accurately indicates a read-only operation ('Lists') but does not mention the effect of the optional 'language' parameter on the output, such as localized genre names. The description is truthful but minimal, lacking deeper behavioral context like potential response format or localization behavior.

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, front-loaded sentence that wastes no words. It communicates the essential purpose effectively. For such a simple tool, this level of conciseness is ideal.

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 tool is simple (one optional parameter, no output schema), and the description clarifies the core function. However, the omission of the 'language' parameter leaves a gap in understanding how output may vary, and the lack of any alternative guidance makes it less complete than it could be. It is adequate but not comprehensive.

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 describes one optional 'language' parameter with a regex pattern but no description. The tool description does not mention this parameter at all, leaving 0% schema description coverage uncompensated. Since the description adds no meaning beyond the schema, it fails to help the agent understand how to use the parameter.

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 uses the specific verb 'Lists' and identifies the resource as 'movie genre names and IDs,' which clearly states what the tool does. It also distinguishes from sibling tools like tmdb_list_tv_genres by specifying 'movie.' The phrase 'for discovery filters' adds context about its role.

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 implies usage through 'for discovery filters,' suggesting this tool is intended to support discovery filtering. However, it does not explicitly state when to use this tool over alternatives (e.g., tmdb_list_tv_genres) or provide any exclusions. The usage guidance is implicit rather than explicit.

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