getKeyStatus

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

Annotations already indicate safe/read-only/idempotent behavior; the description adds that it reads no market data and checks key/plan. It doesn't contradict annotations, though it could mention potential error cases, but given annotation coverage this is solid.

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?

Two concise sentences convey purpose, usage, and a key constraint (no args). No redundant or verbose content.

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?

The description covers purpose, when to use, and the nature of the output (reports key status and plan). Given the simplicity and lack of an output schema, this is sufficient for a diagnostic tool.

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 input schema is empty (0 parameters), and the description explicitly confirms 'Takes no arguments,' eliminating any ambiguity about invocation.

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 (report API key sending status and plan) and distinguishes it from sibling data-fetching tools by focusing on key health, not market data.

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 explicitly tells when to use it (when rate-limited, refused, or user asks about key) and implies its distinct role vs. data tools, providing unambiguous usage context.

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