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

With no annotations, the description must carry the burden of disclosure. The verb 'Get' implies a read-only operation, and the description lists specific return components (health, timestamps, counts). However, it does not disclose potential side effects, authentication requirements, or behavior on error. For a simple health getter, this is adequate but not rich.

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 sentence that is front-loaded with the verb and resource, followed by the key output types. Every word contributes meaning, with no filler or redundancy. This is exemplary conciseness.

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 (no parameters, no output schema, no annotations), the description provides a reasonable summary of what is returned. It mentions three distinct data points but does not elaborate on the structure of 'health' or the exact format of timestamps. For a health endpoint, this is nearly complete, falling just short of fully specifying the response.

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, so the baseline is 4. There is no parameter detail needed in the description, and the schema already covers the absence. The description correctly adds no parameter information, which is appropriate.

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 'Get AI API v2 health, freshness timestamps, and content counts' clearly identifies the specific resource (AI API v2) and the type of data returned. It is not a tautology and distinguishes this tool from sibling detail getters like get_hotel_details or get_restaurant_details by focusing on an infrastructure health endpoint.

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 usage is implied by the description: use this when you need AI API health status, freshness timestamps, or content counts. However, there is no explicit mention of when to use it versus alternatives, nor any exclusions. Given the sibling tools are for different resources, the context makes the intended use fairly clear, but explicit guidance is absent.

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