get_user

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

Annotations already fully declare the safety profile (readOnly, idempotent, non-destructive). The description adds no behavioral context beyond that, such as return format, permissions, or scoping. With rich annotations, this is adequate but not additive.

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 clear sentence that is front-loaded and contains no filler. It states the action and resource efficiently, appropriate for a simple getter.

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 single-parameter read-only operation with strong annotations, the description is sufficient to orient an agent. It could have clarified what 'detailed' includes or whether any user can be fetched, but the simplicity of the tool makes that a minor gap.

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 100%, so the schema already documents the only parameter (user_id). The description adds no extra semantic meaning about the parameter, maintaining the baseline score.

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 'Get detailed user information' clearly identifies the verb and resource: it retrieves data about a single user. It is distinguishable from sibling list_users by the singular 'user' and 'detailed', though it does not explicitly state that it fetches by user_id.

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?

Usage is implied by the name and schema: use when you need details of a specific user by ID. However, no explicit guidance is given about when to choose this tool over list_users or other siblings, so the agent must infer the context.

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