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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so the safety profile is covered. The description adds real context beyond them: the required permission scope (profile:read), the account/MCP-key prerequisite, and the important boundary that email/password/2FA are owner-managed in the console and never handled by an agent.

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?

Three short, front-loaded clauses: what is returned, then the credential-management boundary, then permission and prerequisites. The bracketed prerequisite is slightly noisy but each sentence carries distinct information.

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?

With no output schema, the description compensates by enumerating the profile fields returned and stating the auth/permission prerequisites. Nothing essential for correct invocation is missing, though naming the sibling whoami tool would close the last gap.

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 no parameters, so the baseline is 4. The description correctly implies a no-argument call and instead spends its words on what the read returns and the permission needed to perform it.

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 specific resource (the account profile) and enumerates the fields returned (name, email, company, phone), so an agent knows exactly what it gets back. It does not, however, distinguish this from the sibling gpucloud_whoami or contrast with gpucloud_update_profile, which is the one remaining ambiguity.

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?

Usage is only implied — it is a read-only lookup gated by profile:read and an account/MCP key. There is no explicit statement of when to call this versus gpucloud_whoami (identity-only) or the console, leaving the agent to infer the distinction.

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