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

Annotations cover the write/destructive profile but nothing about workflow. The description adds major context the annotations cannot: the call only stages a request, the owner must open a link and approve in-browser with a PIN, and the agent must never request or accept that PIN in chat. It also discloses the self-role restriction.

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?

Front-loaded with the action, then role semantics, then constraints, then the staging/PIN workflow. Four sentences, each carrying real information; the trailing PIN safety instruction is distinct and not redundant, though the role-definitions clause is slightly verbose.

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 and annotations limited to safety hints, the description carries the full burden and does: it covers the staged-approval flow, the security handling of the PIN, and the self-role limitation. An agent has everything needed to call and explain the tool correctly.

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 coverage is 100%, so a 3 is the baseline, but the description adds meaning beyond the schema: it explains what owner/admin/member actually confer, and clarifies the optional workspace param is only needed when the caller owns more than one (matching the schema note but reinforcing it in prose).

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+resource ('Make a member of a workspace you own an admin, a member, or an owner') and defines each role's meaning. The 'admins put people in access roles' phrasing implicitly separates this from sibling assign_access_role, and the owner/admin/member semantics distinguish it from invite_member or remove_member.

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?

Imposes a clear precondition ('a workspace you own') and an explicit exclusion ('You can't change your own role this way'), which gives the agent real routing signal. It stops short of naming the sibling alternative to use instead, so it is clear context rather than full when/when-not/alternative guidance.

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