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

Unusually good: it pre-empts the confusing readOnlyHint=false by explaining that returning the vote link can close a vote when time is up, and it states the privacy scope (aggregate totals, never individual votes). It stops short of noting pagination or error cases, and for a single-match fetch those are minor.

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 sentences, each carrying distinct load: return contents, the routing precondition, then the read-only caveat. Nothing is padded and the caveat is front-loaded well before it could cause a wrong call.

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, the description carries the return-value burden and does so by enumerating the payload fields and the aggregation granularity. The side effect on vote closure is disclosed, leaving nothing an agent needs before calling.

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% and the matchId description already names pick_teams and get_squad as sources, so the description's restatement adds no new syntax or format detail. Baseline 3 for a one-param tool whose schema does the heavy lifting.

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?

Names the resource and enumerates exactly what comes back: teams, score, vote link, vote count, and result once voting closes. It also draws the boundary against siblings by tieing its use to pick_teams, enter_result, and get_squad.

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 explicit entry points: call it after pick_teams or enter_result, or feed it a matchId obtained from get_squad. An agent can route to it without inference or opening another schema.

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