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

Annotations already declare readOnlyHint=true, openWorldHint=false and destructiveHint=false, so the safety profile is covered structurally. The description adds the returned field set (name, email, role), but says nothing about auth requirements, permission scoping, or behavior on unknown UUIDs.

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; the action, key, and payload are all stated in one pass.

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 simple read-by-id tool with an output schema present, the description covers the essentials — resource, key, and returned fields — so return-value explanation is unnecessary. Only the sibling disambiguation is missing.

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 reported at 0% despite the nested 'id' carrying a short description, and the description adds only that the identifier is a UUID — which the schema already enforces via format and pattern. It does not clarify the nested pathParams wrapper.

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 and resource ('Get user profile') and enumerates the returned fields, so the agent knows exactly what this returns. It does not, however, distinguish itself from the closely related sibling 'get-me' or from 'list-users', which a reader must infer from the name alone.

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 guidance on when to use this versus 'get-me' (current user) or 'list-users' (enumeration). The only implicit signal is the 'by UUID' phrase, which hints at lookup semantics but never states an exclusion or condition.

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