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

Annotations already provide readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=true, which cover the safety and idempotence profile. The description adds the 'no payment' aspect, which is useful context beyond annotations, but doesn't describe response format or potential latency. It adds minor value without contradicting annotations.

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 two sentences with no waste. It front-loads the key fact (free health check) and states the primary use case (verify server is live). Every word earns its place.

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 tool with no parameters, an output schema that covers the return format (not provided in the context signals but stated), and annotations that define safety (readOnly, idempotent, non-destructive), the description is complete. The agent has all needed information to invoke it correctly.

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 0 parameters)Skip content

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 does a free service health check with no payment required, and its purpose is to verify the server is live. It uses a specific verb ('verify') and resource ('server'), distinguishing it from sibling tools that analyze content or generate reports.

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 for checking server liveness, and notes it's free with no payment. However, it doesn't explicitly state when to use this tool vs alternatives, nor does it mention any exclusions or conditions that would make this tool inappropriate. The context is clear but limited.

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