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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so the safety profile is covered structurally. The description contributes useful scope information about what the response contains, but says nothing about behavior on an unknown project_id, error conditions, or whether the quota figure is live or cached. With annotations carrying the safety burden, this is an adequate but not rich contribution.

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?

One dense sentence with the resource scope front-loaded and no filler. It is slightly noun-phrase-heavy (no leading verb such as 'Retrieve'), but every clause carries 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 carries the duty of describing return values, and it names five distinct returned data points (availability, generation permission, publishing permission, quota used, quota limit). It does not describe the response shape or units of the quota, which is the only meaningful gap for a simple one-parameter read tool.

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?

Schema description coverage is 100% and the single parameter already documents the id-or-slug fallback behavior in detail. The description never mentions project_id, so it adds no meaning beyond the schema; baseline 3 applies because the schema does the work.

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 the resource (plan and entitlements for one project) and enumerates the concrete facts returned: MCP availability, AI generation and publishing permissions, and article quota used/limit. That is far more specific than the title 'Plan status'. It does not explicitly differentiate itself from the account-level sibling get_account, which is the one nearby tool an agent could confuse it with.

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?

There is no statement of when to call this versus get_account, get_project, or the various quota-consuming tools like start_scan or apply_fix. The mention of quota used/limit weakly implies a pre-flight check, but that inference is left entirely to the agent. No exclusions or alternatives are given.

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