get_subscription_status

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

No annotations are provided, so the description carries the full behavioral burden. 'Check' and the get_ naming imply a safe user-scoped read, and it lightly signals the return content (status plus plan details), but it says nothing about auth requirements or what happens when the user has no subscription.

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 essential action and object come first. It is appropriately sized, though it could have used the remaining space for the sibling routing that is missing.

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 zero-parameter read with no output schema, the description covers the essentials by naming what is returned (status and plan details). The one real gap is disambiguation from the sibling plan-listing and feature-access tools.

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 no parameter semantics to document. The baseline for a parameterless tool is 4, and nothing in the description misrepresents the empty schema.

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 pair: checking the user's subscription status and plan details. It is clear stand-alone, but it never distinguishes itself from the close sibling get_subscription_plans or from check_feature_access, so an agent must guess which subscription-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 rather than get_subscription_plans, check_feature_access, or get_payment_history, all of which live in the same subscription/payment cluster. The description only implies usage through its wording.

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