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

Annotations already indicate readOnlyHint=false, idempotentHint=false, and destructiveHint=false, so the description doesn't need to restate those. It adds useful behavioral context: the token is redeemed for the linked account, the tool joins the workspace, and it switches to that workspace. This goes beyond the schema and annotations.

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 a single, compact sentence that front-loads the action and includes the key source of the token. No wasted words.

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 a single-parameter tool with no output schema, the description covers the essential context: what the token is, what happens when redeemed, and the side effect of switching workspaces. It could mention error cases or idempotency, but annotations already cover the safety profile.

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 schema already documents the token parameter. The description adds that the token comes from the invitation email, which is helpful, but it doesn't add much beyond that. Baseline 3 is appropriate.

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 clearly states the action ('Redeem a workspace invitation token'), the resource (workspace invitation), and the effects ('joins the workspace and switches to it'). It distinguishes itself from sibling tools like invite_workspace_member and cancel_workspace_invitation by focusing on the redemption/acceptance flow.

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 the usage context: the token comes from the invitation email, and the action is for the linked account. It doesn't explicitly state when not to use it or name alternatives, but the context is clear enough for an agent to select it over invite_workspace_member or cancel_workspace_invitation.

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