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

Annotations already declare readOnlyHint=true and openWorldHint=true, so safety is covered. The description adds genuine behavioral context: tied places, source ordering and manual rankings are preserved, literal n/a scores are never coerced to zero, num_items counts only the current page, and hidden results are excluded. That is useful, but it overlaps significantly with the required path/pagination semantics already documented 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?

The purpose is front-loaded, but the opening sentence is a long run-on enumeration of every returned field, which duplicates the existing output schema. The second sentence packs path semantics, validation behavior and edge-case guarantees together, making the whole harder to scan than necessary.

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, annotations and full parameter coverage already present, the description still covers pagination discipline, path validation and ordering/scoring edge cases. It is close to complete, with only minor gaps such as what happens when the criteria menu rejects a path (error shape), which the output schema does not necessarily cover.

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%, and the description mostly restates the schema's own wording about path, page defaulting to 1, and following native pagination links. It adds only the note that the criteria menu is checked first, which is a behavioral rather than parameter-level detail. Baseline 3 is appropriate when the schema already documents both parameters.

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?

The description gives a specific verb ('Read one page') and resource ('published itch.io game-jam results') plus the scope of the returned payload. It partially differentiates from siblings by naming itchio_jams_results_options as the source of valid paths, though it does not contrast with nearby tools such as itchio_jams_entries.

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?

It states the prerequisite clearly: path must be a native destination returned by itchio_jams_results_options, and the criteria menu is validated before the request. It also scopes out hidden results and account/rating operations. It stops short of saying when to prefer this over the entries/browse siblings, so it is clear context without full alternative routing.

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