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

The annotations already declare this operation as read-only, idempotent, non-destructive, and closed-world. The description adds only the target of the check, which is useful but not rich behavioral context beyond the 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 a single, front-loaded sentence with no wasted words. It is appropriately sized for a simple health-check tool.

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 health check with rich safety annotations, the description is nearly complete. It does not describe the exact return shape, and no output schema exists, but the implied online/offline result is still understandable.

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 takes zero parameters, so the schema has nothing to document and the baseline is 4. The description does not need to explain parameter semantics for a no-argument health 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?

The description states a specific verb ("Check") and a specific resource ("Agent Vending MCP server"), making the tool's purpose unambiguous. It does not need to differentiate from the unrelated sibling tools such as find_construction_leads or square.

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 the context for use: checking whether the MCP server is reachable. There are no relevant alternatives or exclusions to mention, so the absence of explicit when-not guidance is minor.

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