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

Describes side effects for each action: 'emails them their login' for create, 'changes their permissions' for update, and 'creates a new permission set' for create_role. It also mentions the constraint that roles cannot exceed your own permissions. While it doesn't dwell on potential destructive consequences, the actions are inherently non-destructive (no delete) and the description covers the key impacts. No contradiction with the destructiveHint annotation.

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?

The description is compact, using three sentences to cover all actions and key constraints. While it could be formatted with bullet points for clarity, it remains efficient and avoids redundancy. No filler or unnecessary wording.

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?

Provides sufficient context for correct usage: it identifies the three actions, points to the team query tool for reading and role IDs, states admin/owner restrictions, and clarifies the welcome email default. Given the tool's complexity (40 parameters), the description covers the essential operational context without needing to explain every permission field.

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% — every parameter has a description with relevant 'For "action"' qualifiers. The description text adds no extra parameter-level detail beyond what the schema already provides, but it does reinforce the role_id lookup via the team query tool. Baseline 3 applies because schema fully covers parameter semantics.

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?

Clearly states the tool's purpose ('Manage team members and roles') and enumerates the three distinct actions (create, update, create_role) with specific verbs. It also distinguishes itself from the read side by noting that reading team members belongs in the team query tool.

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?

Provides explicit guidance on when to use this tool versus alternatives: reading team members is delegated to the team query tool, and role IDs are to be discovered via that query tool. Also states usage restrictions (admin-only for create_role, workspace-owner-only for admin accounts) and notes the welcome_email default.

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