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

Annotations already declare readOnlyHint and openWorldHint, so safety is covered; the description adds value beyond that with the sort order (oldest first), the pagination contract (hasNextPage), and the effective per-call cap of 300. It stops short of describing play record contents or rate limits.

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?

Two tight sentences: the resource and ordering come first, then the pagination mechanics. Nothing is redundant or padding.

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 does carry the return-side burden and discharges part of it by naming the pagination object and hasNextPage. It omits what a play record actually contains, which is a minor gap for a five-parameter listing tool.

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 page, limit, sport, league and event_id are fully documented in the schema itself (including the monitored-league list and the list_leagues fallback). The description only echoes the limit ceiling already stated there, adding no new parameter meaning.

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 resource (play-by-play for a game) and ordering (oldest first), which cleanly separates it from siblings like get_box_score and get_event. An agent can pick it without opening the schema.

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 practical invocation advice (raise limit up to 300, check pagination.hasNextPage) but never says when to choose this over get_box_score or get_event, nor any prerequisites. Usage is implied by the resource name rather than stated.

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