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

readOnlyHint=true already establishes the safety profile, so the description need not restate it. It does add value by naming the returned fields (job title, contract dates, manager, headquarters, custom fields), which is real behavioral context. It says nothing about not-found behavior or whether custom fields are always populated, but with annotations in place a 3 is fair.

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 tight sentences with the payload description front-loaded. The raw REST path adds little for an agent that never constructs URLs, but it costs only a line and introduces no ambiguity.

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 one-parameter, read-only fetch with no output schema, enumerating the returned fields is exactly the missing piece and it is supplied. Annotations cover safe read semantics; the only residual gap is how this differs from jethr_get_employee.

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 schema itself specifies the UUID pattern and points to jethr_list_employee_overviews as the source. The description only mirrors the UUID via the endpoint path, adding no syntax or format detail beyond the structured field.

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 (get) and resource (one employee's overview record) and enumerates the payload fields, so an agent knows exactly what comes back. It stops short of distinguishing itself from jethr_get_employee, which is the nearest ambiguous sibling.

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?

"One employee's" implies a single-record fetch versus jethr_list_employee_overviews, but no explicit when-to-use or when-not guidance is given. The more important routing decision — overview vs. the plain jethr_get_employee — is left entirely unaddressed.

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