set_property

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

The description adds value by noting that the value is coerced to the property's declared Roblox type when known, which is beyond the schema. However, with no annotations provided, it does not disclose other important behaviors like error handling, return values, or permission requirements.

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?

The description is extremely concise with only two sentences, each adding distinct information. There is no redundant or extraneous text, earning a high score for efficiency.

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 tool's complexity (3 parameters, rich composite types, no output schema) and its mutation nature, the description fails to cover essential context such as how to obtain a valid ref, valid property names, error conditions, or how the tool integrates with other tools like get_root or search. The schema provides type details but the description lacks procedural context.

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 0%, so the description must compensate. It implies that ref identifies the instance, name is the property, and value is the new value, but does not explicitly describe each parameter's semantics or how to construct composite values. The coercion note is relevant but insufficient.

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 clearly states the verb (set) and resource (property on an instance) and introduces the mechanism (by ref). It distinctively identifies the tool's purpose without confusion with sibling tools like get_properties or get_by_path.

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?

No guidance on when to use this tool versus alternatives. There is no mention of when not to use it, prerequisites, or context where another tool would be more suitable. The usage is only implied by the generic description.

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