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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is fully covered. The description adds that results are scoped to the current organization and returned 'latest' first, though 'latest' is vaguer than the schema's explicit sortBy/sortOrder defaults. Nothing is said about pagination behavior or result volume, but the annotation coverage lowers the bar.

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, front-loaded with scope before capability. Nothing is wasted, though the second sentence is generic filler that could instead have carried a concrete detail about filtering or pagination.

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 ten optional parameters and no output schema, an agent still lacks information about what a returned expense record contains and how pagination limits (pageSize max 20) affect retrieval strategy. The description is accurate but minimal for a tool of this breadth; the rich schema compensates partially.

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 all ten parameters, three enums, and defaults documented inline, so the schema carries the full burden. The description adds no filter semantics beyond 'optional filtering and sorting', so the baseline of 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?

The description states a specific verb and resource ('List expenses') and scopes it to 'the current organization', which is meaningful information not carried by the schema. It does not distinguish itself from siblings like fetch_expense or create_expense, but the list-vs-fetch distinction is largely implied by the name.

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?

There is no when-to-use guidance: nothing says when to use this instead of fetch_expense for a single record, or which filters are most efficient. The only usage information is 'optional filtering and sorting', which merely restates that all ten parameters are optional.

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