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

The 'Read-only' sentence merely restates readOnlyHint=true and openWorldHint=false already in annotations, so it adds no new behavioral context. It does, however, correctly reinforce the safety profile and does not contradict it; with annotations carrying the burden, this is adequate rather than rich.

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?

Two short sentences: the usage trigger is front-loaded and the read-only note trails. No filler or repetition beyond the brief safety restatement.

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?

An output schema exists, so the return shape (profile fields) needn't be explained, and the description covers when to call it. The only minor gap is that it doesn't say what the profile contains beyond account name, but for a zero-parameter read that is acceptable.

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 zero parameters, so there is nothing for the description to disambiguate; baseline 4 applies. No misleading parameter guidance is given.

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 resource (the connected QRStuff account / account name) and implicitly a retrieval verb, so an agent can tell it apart from get_account_overview, get_account_entitlements, or get_account_activity. It is clear but doesn't explicitly contrast with those sibling account tools.

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?

Gives an explicit trigger: 'Use this when the user asks which QRStuff account is connected or for their account name.' That is a clear use condition, though it names no exclusions or alternative tools (e.g., get_account_overview) for adjacent account questions.

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