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 nothing beyond that — no note on which parameter actually drives the lookup, no pagination/offset behavior for the sort/offset/sortDir params, no auth or rate-limit 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?

The description is short, but this is under-specification rather than conciseness. A single noun phrase with no verb cannot earn its place against six undocumented parameters.

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 described, but a six-parameter tool with three competing identifier fields and 0% schema coverage demands far more than one fragment. It is not sufficient for correct invocation.

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% across six parameters (id, url, path, sort, offset, sortDir). The description contributes zero meaning, leaving the agent to guess whether id, url, or path identifies the franchise and what sort/offset do.

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?

Names the resource (Box Office Mojo franchise) and implies a detail/retrieval operation, so the agent can roughly tell it apart from the sibling boxofficemojo_franchises list tool. However, 'detail' is a noun fragment with no explicit verb, and it does not clarify which identifier it accepts or what level of data it returns.

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 when-to-use, when-not-to-use, or alternative routing is given. The sibling list tool boxofficemojo_franchises is never mentioned, so the agent must infer that this is the single-item counterpart.

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