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

Annotations supply readOnlyHint=true, so safety is covered. The description adds non-obvious behavioral context beyond that: it discloses the HTTP endpoint and warns that the call 'returns one page, not all matching records', which is exactly the pitfall an agent needs to know for a paginated read.

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, front-loaded sentences with no filler. The pagination caveat is placed last but earns its spot; a slightly more explicit purpose verb would improve the opening.

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 read-only list tool with no output schema and fully documented parameters, the description covers the essential caveat (partial results, needing pageIndex advancement) and the endpoint. It omits what a route record contains, but the schema and absence of an output schema make that a minor gap.

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%; limit, pageIndex, wField/wValue/wOperator and fields are all documented in the schema, including the pagination mechanics. The description only indirectly reinforces paging ('one page'), which is baseline for a fully documented schema.

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 ('Service routes') and the endpoint GET /v1/routes, making it clear this is a listing operation over routes rather than a single fetch like get_route. It doesn't explicitly contrast with siblings such as list_scheduling or get_route, so it stops short of full differentiation.

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 hints at downstream usage ('their IDs can filter the scheduling view') and implicitly routes the agent away from list_scheduling, but gives no explicit when-to-use/when-not guidance or prerequisites for choosing this over get_route or list_scheduling.

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