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 covered. The description adds filter direction semantics, which is useful, but it does not disclose any additional behavioral traits such as permissions or response format. With annotations doing the heavy lifting, a 3 is appropriate.

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 sentences, no waste, and the filter semantics are front-loaded. The description is appropriately sized for a simple list tool.

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?

Given the low complexity, read-only annotations, complete schema parameter descriptions, and absence of an output schema, the description covers the essential invocation context. It could mention default pagination behavior, but the schema already handles that, so the definition is largely complete.

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 the baseline is 3. The description meaningfully clarifies the relationship direction for asset_id (all parts for one asset) and part_id (all assets using a specific part), adding semantic value beyond the schema's terse filter labels.

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 parts associated with assets. It also explains what each filter returns, which helps an agent understand the tool's purpose. However, it does not differentiate from similar siblings like list_infrastructure_asset_parts or list_parts, so it falls 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 clearly explains when to use asset_id versus part_id, giving direct usage context for the two main filters. It lacks any when-not-to-use guidance or explicit alternatives, but the conditional usage is clear enough for an agent to select correctly.

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