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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safe-read nature is covered. The description adds nothing beyond 'list' which is already in the name and annotations. It does not disclose whether the list is static, ordered, paginated, or returns a specific set, but for a simple list tool with no parameters, the annotations provide sufficient behavioral baseline. No contradiction.

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?

The description is a single sentence with no wasted words: 'List education level values.' It is appropriately sized for a tool with no parameters and a straightforward function. The information is front-loaded and clear.

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?

Given the tool's simplicity (no params, no output schema, annotations cover read-only behavior), the description is nearly complete. An agent needs to know only that it returns a list of education levels, which is stated. A minor gap is the lack of any mention of return format or whether the list is enumerable, but this is not critical for a no-parameter enumeration tool.

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?

The tool has zero parameters, and schema coverage is 100% (effectively empty). With no parameters, the description does not need to add parameter details. The baseline for tools with no parameters is 4, and the description appropriately does not attempt to explain non-existent parameters.

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 'List education level values' clearly states the verb (list) and resource (education level values), distinguishing it from sibling list tools that target other entities (e.g., hires_list_experience_levels, hires_list_employment_types). It is concise and unambiguous, though it does not explicitly contrast with siblings.

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?

There is no guidance on when to use this tool versus alternatives. While the name and description imply it is for fetching education levels, there is no mention of context, such as when combining with candidate or job operations, or any alternative tools to consider. The sibling list of similar list tools (experience_levels, employment_types) creates potential confusion without explicit usage notes.

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