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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered structurally. The description contributes nothing beyond that — no note on data scope, identity resolution, pagination, or how id vs url interact. It is a bare label, not behavioral context.

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?

Extremely short, but brevity here reflects under-specification rather than efficiency. There is no front-loaded action or scope, only a duplicated resource label, so the sentence does not earn its place as useful content.

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 two undocumented parameters, no usage rules, and no sibling differentiation, the description is wholly inadequate. The presence of an output schema excuses it from explaining return values, but every other gap remains open.

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?

Two parameters (id, url) exist with 0% schema description coverage and the description mentions neither. With low coverage the description is expected to compensate, and it does not indicate whether id and url are alternatives, what identifier format is accepted, or that both are optional (0 required).

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 'IMDb name credits' merely restates the tool name (imdb_name_credits) without a verb or any statement of what is actually retrieved. It does not distinguish this tool from close siblings such as imdb_name, imdb_title_credits, or imdb_title_company_credits, leaving the agent to guess at scope.

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 when-to-use guidance, no statement of prerequisites, and no pointer to alternative tools. The agent cannot tell from this text whether credits are filmography credits, awards credits, or something else, nor when to prefer imdb_name instead.

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