Upcoming Movies

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

With no annotations provided, the description carries the full burden of behavioral disclosure. 'Get upcoming movies' implies a read-only operation but doesn't specify authentication needs, rate limits, pagination behavior, or what 'upcoming' entails (e.g., future releases only). It lacks details on response format or error handling.

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 extremely concise with a single sentence ('Get upcoming movies'), which is front-loaded and wastes no words. It efficiently communicates the core purpose without unnecessary elaboration.

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 annotations and no output schema, the description is incomplete for a tool with 2 parameters. It doesn't explain what 'upcoming' means, how results are returned, or any behavioral traits like pagination or regional filtering. For a read operation with structured inputs, more context is needed to guide the agent effectively.

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 description coverage is 100%, so the schema already documents both parameters ('page' and 'region') adequately. The description adds no additional meaning beyond what the schema provides, such as explaining how 'region' affects results or default behavior when parameters are omitted. Baseline 3 is appropriate as the schema does the heavy lifting.

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 'Get upcoming movies' states a clear verb ('Get') and resource ('upcoming movies'), but it's vague about scope and doesn't distinguish from siblings like 'movie_now_playing' or 'movie_popular'. It lacks specificity about what 'upcoming' means (e.g., release dates, time frame).

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 guidance is provided on when to use this tool versus alternatives like 'movie_now_playing' or 'movie_popular'. The description doesn't mention context, prerequisites, or exclusions, leaving the agent 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.