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

Annotations already declare the safety profile (non-readOnly, non-idempotent, non-destructive, closed-world). The description adds one behavioral trait beyond them — data minimization — but does not explain why a 'check' is non-readOnly/non-idempotent, whether state is recorded, or what errors/auth are needed.

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 privacy constraint is stated up front. It is efficient, though bordering on under-specification rather than tightness.

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 tool whose only input is an opaque body and which has no output schema, the description explains neither the request contents nor what a result means (pass/fail, thresholds, response shape). An agent cannot confidently invoke it from this text alone.

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?

With a single 'body' parameter and 100% schema description coverage, the baseline is 3. The description adds nothing about what the body should contain (subject age, policy id, gating context), and the schema itself only defers to an external OpenAPI resource.

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 ('Check age-gated access'), which is clearer than the tautological title 'Run an Age Pass check'. However, it never distinguishes itself from the close siblings age_catalogue or shelf_check_age, so an agent must infer which age-related tool to pick.

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, no prerequisites (auth, prior token issuance, catalogue lookup), and no exclusions. The privacy framing hints at a use case but does not tell the agent when this is the right call.

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