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

With no annotations, the description carries the full disclosure burden, and it does well: it implies a read-only identity/preflight probe with no side effects and documents the returned content. It stops short of stating auth requirements or failure behavior (e.g., unauthenticated calls).

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 sentences, both earning their place: the first enumerates the return payload, the second states the preflight purpose. The return contents are front-loaded before the usage cue.

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?

No output schema exists, so the description must enumerate return fields, which it does in detail (tier, scopes, credits, rate limit, max page, apply-enabled, ad-free). What is missing is any statement of error/edge behavior, but for a zero-parameter read tool this 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?

The tool takes zero parameters, so there is nothing for the description to disambiguate beyond what the empty schema already communicates. Baseline 4 applies.

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 states a specific verb-and-resource combo ('Return the caller's tier, granted scopes, remaining apply credits, and per-tier limits') and enumerates the exact payload fields. This clearly differentiates it from the job/candidate-oriented siblings, though the verb 'Return' is slightly passive compared to the resource specificity.

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?

It gives an explicit trigger: 'Call this before apply_to_job to confirm you can apply,' naming the sibling and the condition that selects it. It does not state when NOT to call it or note alternative preflight paths, keeping it just short of a 5.

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