list_plans

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

The description merely states 'List', implying a read operation, but without annotations it does not disclose any behavioral traits such as pagination, rate limits, or whether it returns full plan details or only summaries. No destructive or safety information is provided.

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, concise sentence that is front-loaded with the verb and key information. There is no superfluous text.

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 simple, parameterless list tool, the description is adequate to understand its purpose. However, it could mention common details like pagination or ordering to fully prepare the agent, especially given sibling tools exist.

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?

There are no parameters, so the schema provides full coverage. The description adds a minor context ('Merchant subscription plans') beyond the name, meeting the baseline expectation for a parameterless tool.

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 clearly states the tool's action ('List') and resource ('Merchant subscription plans'), distinguishing it from sibling tools like 'get_plan' (single) or 'list_subscriptions' (different entity). However, it does not explain what 'Merchant' implies, leaving some ambiguity.

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?

No guidance is provided on when to use this tool versus alternatives like 'get_plan' or 'list_subscriptions'. There are no hints about prerequisites or scenarios where this tool is inappropriate.

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