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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so the safety profile is fully covered without prose. The description adds useful context by enumerating what each record contains, but says nothing about pagination, ordering, or default result volume for a company-wide list.

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 what the tool returns before the filtering options. The trailing 'GET /v3/reimbursement' is mildly useful for traceability but borders on filler for an agent that cannot make raw HTTP calls.

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 usefully compensates by listing the record fields an agent will receive. Nine optional parameters are all documented in the schema, so the only real gap is the absence of pagination/volume expectations for an unfiltered company-wide listing.

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% with per-parameter descriptions and two enums, so the schema carries parameter meaning entirely. The description's filter list mirrors parameters already documented in the schema and adds no format or combination semantics (e.g., whether status and disbursement_status can be combined).

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 names the resource (reimbursement requests), the entity scope (company-wide), and the returned fields (employee, policy, amount, approval/disbursement status), which lets an agent distinguish it from payroll or time-off siblings. It is written as a noun phrase rather than a verb+resource statement, but the title and endpoint make the list 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?

'Filter by employee, status, policy or request date' implies how the tool is used, but there is no statement of when to prefer it over alternatives, no prerequisites, and no exclusions. Since no sibling tool overlaps with reimbursements, the missing guidance is low-risk but still absent.

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