get_movies_by_id

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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint, and destructiveHint=false, so the safety profile is clear. The description adds little behavioral context beyond the GET method and the id/extended parameters, but it does not contradict the annotations, and the read-only nature is consistent.

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 highly concise and well structured: a one-line purpose, the endpoint, and an Args block. Every sentence earns its place, and the most important information is front-loaded.

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 simple resource-fetch tool, the description is adequate, especially with an output schema and strong annotations present. The only notable gap is the under-specified 'extended' parameter, which could matter for an agent choosing how to invoke the tool, but it is optional and defaulted to null in the schema.

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 must carry the parameter documentation. It does add useful semantics: id is described as 'the id/slug of the resource' and extended as 'extended information to include in the response.' However, 'extended' remains vague with no accepted values or format guidance, so the compensation is incomplete.

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 begins with 'Get a movie,' a clear verb-plus-resource statement, and the explicit endpoint 'GET /movies/{id}' confirms the operation. This distinguishes it from the many sibling movie sub-resources, which are about ratings, aliases, lists, and similar, rather than the movie itself.

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 intended use is implied by 'Get a movie' and the endpoint, but there is no explicit guidance about when to prefer this over alternative movie-related endpoints or list-level tools. No exclusions or alternative tool mentions are provided, so the agent must infer usage from the name and path.

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