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

The annotations already declare readOnlyHint, idempotentHint, and openWorldHint false, so the safety profile is established. The description adds useful context beyond that: it returns plain-text instructions, is quota-exempt, and includes specific auth-flow expectations. It does not contradict 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 compact and front-loaded: a headline phrase, the core output, the actionable instructions, and the trigger condition. Every sentence contributes unique value, and the most important guidance appears before the details.

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, no-output-schema, self-serve guide, the description covers all the essentials: what it returns, how to interpret the auth flow, the per-client URLs, and when to invoke it. There is no residual ambiguity that structured fields would need to resolve.

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?

With zero parameters, the schema is fully covered and there is nothing to add about parameter meaning. The description instead clarifies the return content and auth flow, which serves the parameterless tool well. The baseline of 4 for no-parameter tools 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 names a clear resource (onboarding + connection guide) and a specific verb (returns plain-text instructions), then itemizes exactly what the instructions cover: signup, client credentials, and per-client walkthrough URLs. It also explicitly states the purpose is to help users get set up, which distinguishes it from the filing/search siblings.

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?

It gives an explicit when-to-use trigger: 'call this whenever a user asks how to use this MCP, get set up, or connect a new client.' It also highlights that the tool is quota-exempt, which is a concrete consideration for tool choice. No alternative tool is relevant here, so no exclusions are needed.

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