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

Annotations already provide readOnlyHint and idempotentHint. The description adds a valuable behavioral trait beyond annotations: 'Does not make any API calls to Kinsta,' clarifying that this is a local connectivity/config check with no external side effects. It does not mention return/error behavior, but that is a minor gap.

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 compact sentences with the core purpose front-loaded and the key behavioral caveat placed second. There is no filler, repetition, or restating of the tool name/title.

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 zero-parameter liveness check with read-only/idempotent annotations and no output schema, the description fully covers what the tool does and the key constraint (no API calls). Nothing an agent needs to invoke it correctly is missing.

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 and an empty input schema, so a baseline of 4 applies because there is nothing to document. The description reinforces that no arguments are needed by framing the tool as a simple server/credential check.

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?

States a specific verb 'Check' with two clear targets: that the MCP server is running and that API credentials are configured. Explicitly noting it makes no API calls to Kinsta distinguishes it from every sibling tool that does interact with the Kinsta API.

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 creates clear context: use this tool to verify server and credential readiness. It does not explicitly name alternatives or state when not to use it, but the no-API-call behavior makes the liveness/health-check use case obvious relative to all sibling tools.

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