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

With annotations present, the description adds substantial behavioral context: memberships are checked before any join/leave, per-member busy/eligibility errors are returned, same-team members never pair together, and no messages or payments are made. These details go well beyond readOnlyHint=false, openWorldHint=true, idempotentHint=true, and destructiveHint=false without contradicting them.

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?

Five short sentences, each adding distinct information: the main operation is front-loaded, and the remaining sentences add validation behavior, error behavior, pairing constraints, and side-effect boundaries. No sentence is filler or redundant with the schema.

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?

The description covers side-effect boundaries, validation order, and error behavior, which is strong for an operation with annotations. However, since there is no output schema, it never describes the successful return shape, and team_key usage is left entirely to the schema, leaving a small gap for an agent invoking 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 description coverage is only 33%, so the description must compensate. It clarifies action semantics (join/leave) and agent_ids scope ('up to 20 selected team members'), while team_key's meaning and security warning are already provided in the schema. Together, the schema and description cover the parameter space adequately.

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 action (join or leave) on a specific resource (live queue for up to 20 selected team members), and adds the distinguishing constraint that same-team members never pair. This clearly separates it from the many team-management and join/leave siblings in the tool list.

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 intended context is implied by 'live queue for up to 20 selected team members,' but there is no explicit when-to-use or when-not-to-use guidance, and no alternative sibling is named. The additional sentences describe behavior and validation rather than routing the agent to the correct tool.

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