get_subscription_info

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It clearly indicates this is a read operation ('Get') and specifies what information will be retrieved. However, it doesn't disclose important behavioral traits like authentication requirements, rate limits, error conditions, or whether the data is real-time versus cached. The description adds basic context but leaves significant gaps.

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 perfectly concise - a single sentence with no wasted words. It's front-loaded with the core purpose and efficiently lists the three key information types retrieved. Every word earns its place, making it easy for an agent to quickly understand the tool's function.

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?

Given the tool's simplicity (zero parameters, no output schema), the description is reasonably complete for understanding what the tool does. However, as a read operation with no annotations, it should ideally mention authentication requirements or any constraints on usage frequency. The description covers the 'what' adequately but could better address the 'how' and 'when' aspects.

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 has zero parameters with 100% schema description coverage, so the schema already fully documents the parameter situation. The description appropriately doesn't waste space discussing non-existent parameters. A baseline of 4 is appropriate for zero-parameter tools where the description focuses on purpose rather than parameter details.

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 purpose with specific verbs ('Get') and resources ('API subscription info, usage and remaining quota'). It distinguishes itself from siblings by focusing on subscription metadata rather than content analysis or link data. However, it doesn't explicitly differentiate from potential alternative subscription-related tools (though none are listed).

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?

The description implies usage context (checking API subscription status and quotas) but provides no explicit guidance on when to use this tool versus alternatives. No sibling tools appear to offer similar functionality, so the lack of comparative guidance is understandable but still leaves usage context implicit rather than explicit.

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