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

Annotations already cover safety (readOnlyHint, openWorldHint), but the description adds non-obvious behavior the schema cannot express: the source serves entries 25 at a time and a page past the end returns a valid empty page rather than an error. That empty-page rule is exactly the kind of detail that prevents an agent from mistaking a normal end-of-data response for a failure. It stops short of stating a maximum page limit or whether ordering is chronological, though the page cap is in the schema.

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 sentences, front-loaded with purpose and followed by return shape and pagination caveat; nothing is padding. The field enumeration in the second sentence is long but informative. The opening fragment 'Get List a BoardGameGeek geeklist's entries' reads as a copy-paste artifact and could be tightened.

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 an output schema present, the description did not need to enumerate return fields, yet it does so briefly and harmlessly. It covers the two things an agent must know to call correctly: pagination granularity and past-end behavior. Only the absence of routing guidance to sibling tools keeps this from being fully complete.

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%, with both id and page fully documented including the 1–1000 range, so the baseline is 3. The description's only parameter-adjacent detail is the 25-per-page size, which duplicates what the page property already says. No additional meaning, such as how ids are obtained, is added.

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: retrieve a geeklist's entries from BoardGameGeek, and enumerates what an entry contains (id, linked item summary, author, dates, commentary, rating snapshot). It is clearly distinct from the sibling boardgamegeek_geeklist, which would concern the list itself rather than its entries. The awkward opening 'Get List a BoardGameGeek geeklist's entries' is a wording blemish, not an ambiguity.

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?

Usage is only implied: the reader infers this is the tool for drilling into entries once a geeklist id is known. There is no explicit when-to-use statement, no mention of prerequisites (e.g. needing the id from boardgamegeek_geeklists), and no named alternative for the list metadata itself.

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