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

With no annotations provided, the description carries the full burden, and it delivers meaningful behavioral context: the flow is asynchronous and human-mediated ('owners get an email with one Allow button; nobody there runs a command'), and the requester is notified on approval. This is the key behavioral trait an agent needs to set expectations that no immediate grant occurs.

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 sentences with zero filler. The core purpose is front-loaded, then the mechanism, then the follow-up. Every sentence earns its place.

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?

For an async approval tool with no output schema and no annotations, the description covers purpose, roles, the human-approval workflow, and the confirmation outcome. Minor gap: 'The person' is slightly ambiguous when the email recipient is never explicitly identified as the requester, and there's no mention of what happens on denial or what the tool returns.

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%, so the baseline of 3 applies; the schema already documents target format, tier enum, message, and workspace disambiguation. The description adds no parameter-specific details beyond what the schema provides, but it doesn't need to.

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 ('ask to be let into'), a specific resource ('a tool in someone else's workspace'), and the access tiers (viewer, editor, admin). The phrase 'someone else's workspace' clearly separates it from sibling set_access, which would grant access directly, and allow_request/access_requests, which handle the approval side.

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 implies when to use this tool — when you need access to another workspace's tool rather than granting it yourself — but it never names an alternative or gives an explicit when-not. An agent must infer the distinction from the phrase 'someone else's workspace' and the sibling list.

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