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

Annotations already declare this is a non-read-only, non-destructive, non-idempotent, closed-world mutation. The description adds the optional seeding behavior but does not disclose permissions, duplicate-name handling, maximum list size, or what is returned. It adds some useful context but not rich behavioral detail beyond annotations.

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?

A single, front-loaded sentence with no wasted words. The primary action is stated first and the optional behavior follows concisely.

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 simple three-parameter creation tool with full schema coverage and annotations covering the safety profile, the description is largely sufficient. It could mention what happens on naming conflicts or that a new list is returned, but no output schema exists and the core behavior is clear.

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%, so the schema already documents `name`, `description`, and `property_ids` with constraints. The description mentions the optional property-id seeding but adds no syntax or constraints beyond what the schema provides, making the baseline 3 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 verb and resource ('Create a property list') and adds the optional seeding behavior, making the tool's function clear. It does not explicitly distinguish itself from the sibling `spur_add_properties_to_list`, which handles adding properties to an existing list, but the creation framing is sufficient.

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?

Usage is implied by the verb 'Create' and the optional seeding phrase, but there is no explicit guidance on when to use this versus `spur_add_properties_to_list` or `spur_list_property_lists`. Alternatives and exclusions are left to inference.

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