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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safe-read profile is covered. The description adds only that the rows are 'public,' and gives no auth, rate-limit, or coverage details beyond that. With the safety profile handled by annotations, a 3 is appropriate.

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?

Two compact sentences, front-loaded with the purpose, then the input constraint, then the sibling redirect. Every clause carries information.

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, and annotations cover safety. The description supplies purpose, input constraint, and alternative routing, leaving only minor gaps such as result volume or pagination, which the output schema may absorb.

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 100%, but the description adds real value the schema does not: it states 'pass exactly one' of id or url (schema has no required/oneOf constraint) and hints at the id format ('tt...'). This clarifies the mutual-exclusivity rule an agent would otherwise miss.

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 (Fetch) and resource (public IMDb award and nomination rows for a title), scoping it to title-level data. It explicitly contrasts with imdb_name_awards, so the agent can separate it from the many imdb_* siblings without opening a schema.

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?

Names the alternative tool (imdb_name_awards) and the condition that selects it (person's awards vs a title's awards). The routing decision is explicit rather than inferred.

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