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

Annotations already declare readOnlyHint=true, so the safety profile is covered. The description adds real value beyond that by noting the result is 'as a supervisor sees them', signaling that visibility/fields are permission-scoped, and by citing the backing endpoint GET /api/v1/supervise/employee/{id}.

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 sentence that front-loads the action and resource, then the returned facets, then the API reference. No filler and nothing repeated from the schema.

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?

With no output schema, the description usefully names the categories of data returned (contact, locations, role, employment) and the permission-scoped view. It lacks error/not-found and permission-failure behavior, but for a read-only single-resource lookup it is nearly complete.

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% and the single parameter has its own description in the schema, so the description need not re-explain employee_id; baseline 3 applies. It adds no format or constraint detail (e.g. id provenance) beyond the schema.

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 ('Fetch one employee's details') and enumerates the returned facets (contact, locations, role, employment). The word 'one' plus the singular focus clearly distinguishes it from the sibling deputy_list_employees.

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 singular 'one employee' framing, so an agent can infer this is for a known employee_id rather than browsing. However, it never states when to prefer this over deputy_list_employees or what prerequisites (such as supervisor scope) are needed to call it.

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