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

Annotations already declare readOnlyHint=true, so the safety profile is covered. The description adds useful context beyond that: a fixed page size of 25 per page and the exact default filter (for_service=true, status=assets_being_serviced), which tells the agent this is a scoped read rather than a general asset listing.

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 compact sentences, front-loaded with the scope and pagination. The raw endpoint string is somewhat technical noise but still reinforces the filter semantics, so it earns most of its space.

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, zero-required-parameter listing tool with fully documented schema and no output schema, the description supplies the scope, page size, and default filter needed to call it correctly. Remaining gaps (exact return fields) are acceptable given no output schema must be explained.

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%, so each parameter is already documented. The description reiterates that service_type and service_state narrow results and confirms pagination, but adds no format or syntax detail beyond the schema. Baseline 3 is appropriate.

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 resource (assets currently in maintenance/being serviced) and explicitly encodes the underlying filter scope (for_service=true, status=assets_being_serviced), which sets it apart from the broad list_assets and filter_assets siblings. It doesn't explicitly name those siblings, keeping it just short of a 5.

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 says the tool returns assets in service and can be optionally narrowed by type or state, but gives no guidance on when to prefer this over list_assets, filter_assets, or search_assets. The agent must infer the choice from the tool name alone.

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