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

Annotations already declare readOnlyHint, idempotentHint, and non-destructive behavior, so safety is covered. The description adds useful scope context — results are limited to the current record and gated by an existing subscription, with no purchase or history returned — but stays vague about what 'subscription' enforcement means in practice.

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?

One tight sentence with the core action front-loaded and constraints trailing. No filler, though the trailing clause is somewhat cryptic rather than informative.

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 could clarify what 'record details' returns, but it stays at 'current record details.' For a single-parameter read tool with strong annotations, the basics are covered, but parameter meaning and output expectations remain thin.

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 description coverage is 0% and the sole parameter record_id is left completely unexplained by both schema and description. The description does not clarify the expected identifier format or source, so it fails to compensate for the coverage gap.

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 ('Read current record details'), and adds scope qualifiers ('current', 'no purchase or history'). It does not differentiate itself from nearby siblings such as read_register or search_record_previews, so an agent cannot easily tell which read-path 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?

It implies a precondition ('according to your existing subscription') but gives no explicit when-to-use guidance and names no alternative. With siblings like search_record_previews and read_register available, the absence of routing guidance is a real gap.

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