get_movies_by_id_stats

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

Annotations already declare readOnlyHint=true, openWorldHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is well covered. The description adds only the endpoint path and parameter note, with no extra behavioral context such as authentication or data freshness. This is adequate given the annotation coverage.

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, containing the purpose, endpoint, and a parameter explanation with zero filler. The structure is front-loaded with the core action and cleanly separates the argument documentation.

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 with one parameter and an output schema (not shown), so return format is presumably covered by that schema. However, 'stats' remains ambiguous, and no information is given about what statistics are included or any prerequisites. The description is adequate for basic invocation but lacks clarity on the data being fetched.

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 0%, but the description explicitly states that 'id' is 'The id/slug of the resource.' This adds semantic meaning beyond the schema's bare type definition and clarifies the acceptable format for the identifier.

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 the verb and resource explicitly ('Get movie stats'), but 'stats' is vague and does not specify what statistics are returned. There is a sibling get_shows_by_id_stats, so the resource distinction is present, but the meaning of 'stats' (e.g., ratings distribution, watch counts) is left unclear.

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 no guidance on when to use this tool versus related siblings like get_movies_by_id_ratings, get_movies_by_id_watching, or get_shows_by_id_stats. No conditions, exclusions, or alternative recommendations are given.

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