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. The description adds only that rows are 'ranked' and that the source is a public /genre/ page, which is mild extra context; it discloses nothing about sorting defaults, result size, or pagination.

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?

A single front-loaded sentence with no filler, and the resource is named first. It is appropriately sized, though it is arguably too terse for the gaps it leaves.

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?

An output schema exists, so return values need not be explained, and this is a simple read-only list endpoint. Still, with two fully undocumented parameters and no routing guidance against the boxofficemojo_genre sibling, the definition leaves real gaps for the agent.

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%, so the schema gives no meaning for sort or sortDir, and the description never mentions either parameter. The word 'ranked' hints that ordering exists but does not explain the parameters' accepted values or direction semantics, leaving the agent to infer them.

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?

States a specific verb (Returns) and resource (ranked genre rows from Box Office Mojo's /genre/ page), so the agent knows it's a genre listing. However, it does not distinguish itself from the close sibling boxofficemojo_genre (singular) or other boxofficemojo list tools, so an agent still has to guess which genre tool to pick.

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 only says what it returns; it gives no when-to-use guidance, no exclusions, and never mentions the near-identical boxofficemojo_genre sibling. Nothing tells the agent under what circumstances this tool should be chosen over alternatives.

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