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

readOnlyHint=true already declares the safety profile, so the bar is lower. The description adds some value by disclosing the HTTP endpoint and the response envelope shape ({ valid, page_stats, data }), but says nothing about pagination behavior, result size, or how the verbatim `params` filters are interpreted.

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 short sentences, front-loaded with purpose before the implementation and return-shape details. No filler, though the endpoint reference earns its place mostly for debugging rather than for tool selection.

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 compensates by summarizing the return envelope, and the nested `params` object is covered by the schema. Missing only guidance on pagination semantics and the fact that listing can be narrowed via verbatim query filters.

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 both `_page` and `params` are already documented in the schema; baseline 3 applies. The description does not add filter examples or syntax hints for the free-form `params` escape hatch, which would have been the one place description-level detail was warranted.

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 a specific verb and resource ("List files in the file library") and disambiguates the resource with "(images/attachments)", which no sibling list_* tool covers. The endpoint reference and return envelope make the operation unambiguous.

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 implied by the resource name — you call it to browse files — but there is no explicit when-to-use guidance, no statement about when to prefer a typed filter path over the generic knowledgeowl_request sibling, and no prerequisites or exclusions.

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