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

Annotations already cover readOnly/idempotent/non-destructive, so the bar is lower. The description still adds real value beyond them: 'No params' sets the calling expectation and 'Never returns a key' discloses a security property (no credentials leaked) that an agent would otherwise have to discover at runtime.

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 clauses with zero waste: parameter expectation first, then the two returned booleans, then the security guarantee. Front-loaded and appropriately sized for a trivial 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?

With no output schema, the description carries the return-value burden and does so by naming both fields (authenticated, accountToolsReady). A brief note on what a false value implies for other tools would make it fully complete, but the essential contract is present.

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?

Zero-parameter tool, so baseline is 4. The description's 'No params' explicitly confirms the empty schema, leaving no ambiguity about whether arguments are expected.

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 and resource ('get account status') and then names exactly what the response tells you: whether you are signed in (authenticated) and whether account tools work (accountToolsReady). This is clearly distinct from the set_*/get_* siblings, which operate on GitHub, projects, siteprofiles, and scaffolds.

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 — an agent can infer it is a pre-flight/auth check to run before invoking account-dependent tools, but the description never says 'call this before X' or names any alternative. It also doesn't state whether it is safe to poll or when it is unnecessary.

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