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

Adds substantial context beyond the annotations: the board is publicly shareable, title and team names become public, free boards cap spectators at 50 views and show branding, and the identical requestId plus input should be retried after a timeout. That retry guidance directly operationalizes the idempotentHint in a way annotations alone cannot.

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 dense sentences, front-loaded with what the tool produces, then the intent precondition, then the visibility/limit caveats and the retry rule. No filler sentences.

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 public mutation with an output schema and rich annotations, the description covers the important unknowns: visibility of inputs, free-tier limits, and idempotent retry behavior. Ownership or what a duplicate board creation returns is not addressed, a minor gap.

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?

With 0% schema description coverage, the description carries the load and does so meaningfully: it explains that title and team names are publicly visible and that requestId must be reused identically on retry. It does not cover the requestId pattern or the exactly-two-teams constraint, which remain discoverable only from the schema.

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 and resource ('Create a public, shareable two-team scoreboard'), which cleanly distinguishes it from get_scoreboard, list_scoreboards, update_scoreboard, and hand_off_scoreboard. The trailing fragment 'at zero' is unclear but does not obscure the core action.

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?

Gives an explicit precondition ('Requires explicit user intent to create'), which tells the agent when this tool is appropriate rather than a read or update. It does not explicitly name a sibling alternative for modification scenarios, so it falls short of a 5.

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