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

Annotations (readOnlyHint: true, idempotentHint: true, destructiveHint: false) already establish safety. The description adds value by revealing response states: 'authenticated:true and empty pending[]' vs 'connect_url for the toolkit and per-install URLs' when credentials are missing. However, it doesn't explain what `pending` contains or the JSON shape of `connect_url`.

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 sentences, each earning its place: what it returns, the success case, and the missing-credentials case. It's efficient but could be split into a more scannable structure (e.g., bullet points for the two states).

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 burden of explaining the return value, which it does adequately by covering the two primary states. Gaps remain: what happens when only some providers are connected, what `pending` contains, and the exact structure of the URLs. Still, it's useful for an agent to decide whether to call this before other operations.

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 schema has 0 parameters, so per the rubric, the baseline is 4. The description correctly focuses on behavioral aspects since there are no parameters to document. Nothing more is needed.

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 uses a specific verb+resource: 'Returns connection status and URLs.' It clearly differentiates from siblings like `authenticate` (which establishes auth) and `show_version`/`toolkit_info` (which report version/info, not connection state). The conditional behavior is well-defined.

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 implicitly guides when to use this tool: to check whether providers are connected and retrieve connection URLs. It does not explicitly name alternatives or exclusion criteria, but the context of a status check is clear from sibling differentiation.

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