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

readOnlyHint=true already establishes the safe-read profile, and the description adds pagination behavior plus the underlying endpoint. It does not describe what the returned policy fields look like, but with the safety trait covered by annotations this is solid added context.

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 short sentences with no waste; the content clarification is front-loaded and the paging note follows. Every clause earns its place.

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?

For a simple one-param read tool with annotations and no output schema, the description covers what the list is and how to page through it. The only minor gap is not indicating the shape of a policy item, which is acceptable given the low complexity.

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 single param already documents 1-based paging and the next_page mapping. The description restates that mapping, adding negligible value beyond the schema, so baseline 3 applies.

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 (List) and resource (expense policies) and clarifies the content with a parenthetical: expense kinds and limits per employee. That distinguishes it from the sibling jethr_list_expenses (actual expense records) without naming it explicitly.

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?

The paging instruction ('pass next_page as page') gives usage mechanics but there is no explicit when-to-use or when-not guidance versus jethr_list_expenses or the policy siblings. Usage is implied by the resource naming.

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